When you try to open a table, have you got this error message:

"Memo File is Missing/Invalid"

If yes then do you know the causes of this error??

Why this error occurs:

1. If one of the user performs an action that results in a table's memo file being locked, and a second user attempts to open the same table and access the memo field information, the second client may open the memo file with an incorrect blocksize. This can result in incorrect information being read from the memo field or memo file corruption.

2. Second reason is file corruption.

3. Another most common reasons are the system crashed, or the user switched off the computer, while a table with a memo field was open.

May be there is another different reasons of this error but these all three are most common reasons of this errors.

There are lots of solution of this error but I am explaining here most easy & time consuming procedures:

How to solve this error:

• Copy a valid memo file over the corrupt memo file to access the database again.

• Another solution is valid backup. If you have updated backup then you can easily handle this error by restore your all data from updated backup.

• If above two solution does not work then you have another solution ie use of DBF Recovery Software.These Software are very easy to use.

Stellar Phoenix DBF Recovery is the cheapest and the easiest way to repair dbf file created in foxpro & dbase. It supports dBase III, dBase IV, dBase V & MS Visual FoxPro 6.0, MS Visual FoxPro 7.0, MS Visual FoxPro 8.0, MS Visual FoxPro 9.0. Supports Windows 7, Vista, XP, 2003, and 2000.

First Download Stellar Phoenix DBF Recovery demo version and try the service of this software.

Microsoft Visual FoxPro is a database management system developed by Microsoft Corporation. Microsoft Visual FoxPro stores your significant data in DBF file. Under some circumstances, the DBF file gets damaged or corrupted and you cannot access data from it. DBF file get corrupt due to some error messages like:

”Error 1103 or Invalid Seek Offset(ISO) error”

Due to this error you cannot access Visual FoxPro database and come across critical data loss situations.

But why this error occurs:

The error "Illegal Seek Offset", seems to be caused most often by one of
these situations:

1. Due to corrupt index or corrupt dbf file.
2. Memory resident programs (TSRs).
3. Network software problems.

How to resolved above three issues:

• Usually, it seems to be the first. So recreating the table.

• A clean boot will solve any memory resident program (TSR) problems.

• Solved network software problems by replacing network and workstation cabling and other equipment.

One another solution of this error is an updated and valid backup .You can easily recover DBF database by restoring the backup.

Note: Regularly update your backup to prevent your database from corruption.

If above solutions do not resolved this issue then use good DBF Recovery Software to resolved this error. These software are very easy to use & provide most of the information in demo version. First try demo version of any dbf recovery software for taking an idea about the software.

Stellar Phoenix DBF Recovery Software is a safe, easy-to-understand, and powerful DBF Repair software that repairs corrupted dbf file created in MS Visual FoxPro 7.0-9.0 & dBase III-V application. It is compatible with Windows 7, Vista, 2003, XP, and 2000. This DBF Repair software repairs all database components like table name, column name, column data type, indexes and primary keys.

In the Windows systems, a paging technique is used when there is some memory issues with some applications. In this Virtual memory technique, additional memory is provided to applications through virtual addresses that are being mapped to physical addresses on the hard disk. However, if it is not done perfectly, then it may cause corruption in the DBF file, which can also result in inaccessibility of FoxPro. You should try out appropriate methods to repair DBF file failing which you should go for a DBF file repair software.

Consider a scenario wherein you are working on an software application in MS Visual FoxPro 6.0 for your college project. You open MS Visual FoxPro but it fails to open and exits after displaying few error messages. These messages could be either of the following messages:

• “Insufficient memory”
• “Not enough memory for application (minimum 2187264 required)”
• “Not enough memory for application (minimum 2158592 required)”

Cause:

The root cause of such abnormal behavior of FoxPro is that the virtual memory is not sufficiently available to start FoxPro. Such memory issues can also be caused due to corruption in the DBF file.

Resolution:

To overcome such problems, you should need to perform the following steps:

• Increase the size of the paging file: You should look to increase the size of the Windows Swap file to resolve the virtual memory issues. Restart the system and check if the issue is appearing again.
• Reduce the expandable memory: If you are using an EMS (Expanded Memory Specification) emulator, then reduce or remove the amount of memory that it provides.
• Reduce the size of the disk-caching software: If you are using a disk-caching software, then reduce its size as it may be causing the memory issues.
• Restore DBF file: You should try to restore the FOXUSER.DBF file by renaming it in the command prompt using the following syntax:

     RENAME foxuser.dbf foxuser.dbk

     Restart FoxPro. The Foxuser.dbf file will be renamed when you restart FoxPro.

These aforementioned methods would be able to repair DBF file and start MS Visual FoxPro. However, if it is not the case then there is an immediate need to perform DBF recovery using a professional DBF file repair software. These tools ensure best results while using highly effective repair algorithms in very rich user interface.

Stellar Phoenix DBF Recovery is an excellent DBF repair software that restores DBF files from miscellaneous corruption reasons. Works for MS Visual FoxPro 6.0 to 9.0 and dBase III-V, this DBF recovery software recovers DBF objects including primary keys, column data type, table name, indexes, column name, etc. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Visual FoxPro is a popular data-centric procedural and object-oriented programing language and RDBMS (Relational Database Management System), developed by Microsoft Corporation. The application stores your significant data in DBF (Database File) file. You can retrieve data from DBF file using queries. Under some circumstances, the DBF file gets damaged and you cannot access data from it. It causes serious data loss situations and requires DBF Recovery to be resolved.

There are numerous reasons, which can result into Visual FoxPro database file corruption. Some of the common reasons of data corruption issues in Visual FoxPro are as given below:

• Improper termination of Visual FoxPro while manipulating the data- This problem can occur due to internal application inconsistency errors, fatal exception errors, page faults, power surges, system crash, and voltage spikes.

• Virus Infection- Viruses are one of the biggest threat to your data. You should regularly scan your system using an updated Anti-virus application.

• Data storage components- You should regularly check your hard drive for fragmentation and errors.

• Conflicting applications- Third-party software like screen savers and Anti-virus may cause several conflicts with the Visual FoxPro, which can lead to DBF corruption.

• Faulty or substandard network components- Since Visual FoxPro application handles data too quickly, it could stress your network. Such components might include network interface cards, hubs, switches, network drivers, and cables.

• File locking problems- If one DBF file user performs any operation, which locks the memo file of table, and second DBF user tries to open same database table and then access memo field, second user might open memo file with wrong blocksize. It results into the memo file corruption.

• Service packs and network settings- You should make sure that the database servers are using the latest service packs. Also check the settings, such as disk caching, on client computer. You can also try switching the drivers of network clients.

If you run across any of the above situations, the DBF file becomes completely unusable. If corruption is severe, you can not even open the Visual FoxPro application. In such cases, DBF file repair tools are required to extract inaccessible data.

DBF Repair software use highly-advanced scanning mechanisms to ensure absolute recovery in all DBF file corruptions situations. They repair DBF file in a safe, quick, and easy way.

Stellar Phoenix DBF Recovery is a powerful and advanced utility to successfully repair and restore damaged DBF file. The software works well with Visual FoxPro 6.0-9.0 and dBase III-V. It restores all DBF file items, including indexes, table names, column names, primary keys, and column data types.

Is your DBF (Database File) file corrupt after Visual FoxPro application malfunction? Are you unable to access data from DBF file subsequent to an application malfunction? Application malfunction is a situation where Visual FoxPro stops responding or otherwise gets crashed during typical operations. This behavior can be caused by various factors, including system errors and user errors. Application malfunction is one of the major reasons of DBF file corruption and leads to severe data loss situations. In such critical circumstances, you must have an absolute backup to restore data from. In case backup is unavailable, DBF Recovery is the only way to work around this issue.

Application malfunction is a situation where a software application, which you use regularly, starts behaving strangely and throws error messages when you use it. You cannot access your precious data from the data file of the application. The problem can be caused by any of the following reasons:

• Missing or corrupt application files- If some significant application files are damaged, application may not work properly. Such files include library files and DLLs. The files may get damaged due to numerous reasons, such as virus infection, user errors, and improper system shutdown.

• Conflict with newly installed application- If you have recently installed a new application into your Windows computer, the problem can be due to application conflict. It can occur because of some particular clashes or restrictions.

• Operating System Corruption- Every application is run by the Windows operating system. If operating system itself is damaged, applications may also get damaged and malfunction.

Visual FoxPro application malfunction is a very critical situation, which may corrupt the DBF file and lead to serious data loss. In such cases, you must repair DBF file using appropriate solutions to get your valuable data back.

In case of DBF file corruption, you need to restore it from the most recent and valid backup to extract data from it. However, if you do not have a current copy of backup, DBF file repair is the only way to go.

You can easily repair and restore corrupt DBF file using commercial DBF Repair software. They use high-end scanning mechanisms to perform systematic scan of entire database and extract all inaccessible data from it. The applications offer easy and safe recovery with rich graphical user interface and non-destructive conduct.

Stellar Phoenix DBF Recovery offers assured recovery of inaccessible and damaged DBF file in all cases of corruption. It works well with Visual FoxPro (6.0 to 9.0) and dBase (III to V). The software restores all DBF file objects such as column name, table name, indexes, constraints, and column data type.

Visual FoxPro is a procedural and data-centric object oriented database programing language, developed and marketed by Microsoft Corporation. Visual FoxPro is closely integrated with the relational database engine that extends xBase capabilities of FoxPro to support Structured Query Language (SQL) data manipulation and query. It is a dynamic programing language, which doesn't need any additional programing environment. The FoxPro stores your data in the form of tables, which are stored in DBF file format. In some cases, the DBF file may get damaged and become inaccessible. This behavior leads to severe data loss and requires DBF Recovery solutions to be fixed.

The table file of Visual FoxPro (DBF file) contains two records- the header record and the data record. Header record of DBF file defines complete structure of FoxPro table and stores additional information about the table. Header record begins from the file position zero. The data record follows the table header, in successive bytes, and stores actual data of table's fields.

• Data in FoxPro data file begins from the position pointed in the bytes 8 to 9 of header record. The data record start with one delete flag byte. In case the delete flag byte is 0x20 (ASCII space), record is not removed. If bye it 0x2A (ASCII asterisk), record is removed.

Length of the data record is considered by adding all the defined lengths of table fields. Integers in FoxPro table are stored with least important byte first mechanism.

Under some situations, the DBF file or Visual FoxPro table gets damaged and puts you in need of DBF Database Repair solutions. The most common causes of DBF file corruption are as given below:

• File header or header record corruption.

• Application malfunction of Visual FoxPro.

• Virus infection.

• Improper system shutdown due to power outage or system crash.

If you come across any of the above situations, you need to recover DBF file by restoring it from the most recent and valid backup. To ensure highest data safety, you must regularly update your backup.

However, in case you do not have a valid backup, you need to repair DBF file using advanced and powerful commercial applications. The software are particularly designed to methodically scan whole DBF file and extract all inaccessible data from it. They have highly-interactive user interface to offer easy recovery.

Stellar Phoenix DBF Recovery is the most excellent solutions to successfully tackle all DBF file corruption scenarios. The software works well with Visual FoxPro 6.0 to 9.0, dBase III, dBase IV, and dBase V. It retrieves all DBF file objects, such as indexes, table name, column data type, primary keys, and column name.

In dBase database system, the DBF (dBase File) files are used as the backend support for various applications sucas Visual FoxPro. These files contain the header and the data records wherein the header describes the structure of the DBF file whereas the data records contain the actual text of the fields used in the database. At times, the header of the DBF file may get corrupt due to various reasons thereby making the database corrupt. You should use certain methods to repair the corrupted DBF file. However, if you are not able to get the DBF file repaired then you should use a third-party DBF Repair software to restore the DBF file and access the database.

Consider a scenario wherein you have an interactive website made in asp.net with dBase III as the backend support. This website requires the users to sign in with their username and password. One day, you got complaints from few users that they are unable to log in as the following error message was getting displayed everytime they try to log in:

“ERROR [42S02] [Microsoft][ODBC Visual FoxPro Driver]File 'table.dbf' does not exist.”

Cause:

The root cause for this error message is that the DBF file may have got corrupt. The reasons for DBF corruption could be virus infections, damage in the header file, simultaneous modifications by multiple users, bugs in the application, etc.

Resolution:

To resolve the aforementioned situation for a smooth error-free log-in, you should look to repair DBF file. To do this, you can check for the backup of the DBF file. If the backup is updated and clean, then you should restore the database from the backup

However, at times it may happen that the backup is not clean then you should look to go for a third-party DBF file repair software to recover DBF file. Such tools are read-only in nature that do not overwrite the original database while using fast yet sophisticated scanning algorithms.

Stellar Phoenix DBF Recovery Software is a DBF repair software that is repairs corrupted DBF files from all instances of corruption. It is able to Repair DBF file created in MS Visual FoxPro 6.0, 7.0, 8.0, and 9.0. This DBF recovery tool is able to recover various DBF objects such as table name, column name, column data type, indexes, and primary keys. In addition, it supports dBase III, IV, and V. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Microsoft Visual FoxPro is a database management system developed by Microsoft Corporation. It stores all your valuable data in the forms of tables. Every table is stored as an individual file with DBF file extension. You can access data from tables, store data to the tables, or delete data from tables by querying. However, in some situations, the DBF file of Microsoft Visual FoxPro gets damaged and it becomes totally inaccessible. This behavior causes critical data loss situations and you must Repair DBF file, if there is no backup in place.

As a practical example of this problem, you may come across the below error message when you try to preview an ASP (Active Server Page) page, which has a connection to Visual FoxPro table:

“Microsoft OLE DB Provider for ODBC Drivers error '80040e14' [Microsoft][ODBC Visual FoxPro Driver]File '<your .dbf filename>' does not exist.
/<your web name>/<your .asp filename>, line <line number in .asp>”

After the above error message, you cannot access the DBF file. The database file becomes totally unusable. In order to extract data from corrupt database table, you must find out the cause of corruption and then perform DBF recovery by fixing it.

Cause:

You may come across this behavior due to any of the below configuration problems:

• FoxPro database is stored on a computer other than IIS (Internet Information Server) server.
  And
  IIS server is set up to use the NT Response/Challenge while accessing safe script files.

• The DBF file is stored on a computer other than a computer running IIS.
  And
  IIS is set up to use Clear Text (Basic) authentication while accessing safe script files.

• FoxPro databases are stored on same computer as IIS.
  And
  You're using UNC pathing to DBF files.

Solution:

You can try fixing this problem by using any of the below methods:

• Move your DBF file to to a new server, which has IIS server enabled.

• Repair and restore the corrupt DBF file using powerful and advanced third-party application, called DBF file repair software.

The applications are particularly designed to carry-out in-depth scan of entire DBF file and extracts all inaccessible data from it. They are incorporated with simple and interactive graphical user interface to ensure quick and easy DBF database Repair in all cases of corruption.

DBF Recovery Software is the most advanced utility to ensure absolute recovery of all your inaccessible data from the DBF files. It works well with dBase V, dBase IV, dBase III, and Visual FoxPro (6.0 to 9.0). The software restore all DBF file objects, such as table, table name, column name, indexes, primary keys, and data types.

Are you encountering an error message while trying to open your MS Visual FoxPro 8.0 database? Is your MS Visual FoxPro 8.0 database displaying abnormal behavior? If the answer for any of the two above questions is 'Yes', then in most cases your MS Visual FoxPro 8.0 is logically corrupted. Few common reasons for MS Visual FoxPro 8.0 corruption could be application malfunction/bugs, installation of conflicting software, network device damage, and malicious software like virus. An ideal option to overcome a MS Visual FoxPro 8.0 database corruption situation is by restoring the database from an adequate database backup. However, this solution fails when the database user has not maintained any database backup or created a backup on a storage media that is itself damaged. In such situations, the only way to get past MS Visual FoxPro 8.0 database corruption is to repair the database by using a commercial DBF File Repair application.

The above scenario can be explained with the help of this real-time scenario. Suppose you have built a MS Visual FoxPro 8.0 database and saved it on your system. Since, you want your computer system to be safe from all kinds of virus attacks, you install a new anti-virus in your system. However, after the installation of the anti-virus is complete, you are no more able to access your MS Visual FoxPro 8.0 database. In addition, you receive an error message each time you try to access the database records. 

Cause:

The above error message appears because your MS Visual FoxPro 8.0 database is corrupted due to installation of a conflicting software (anti-virus software).

Resolution:

To repair your MS Visual FoxPro 8.0 database and surmount the corruption error message, you will need to take below steps:

1. Use a valid backup and restore it at required location.

2. In case of absence of an adequate database backup, you will need to look for a third-party DBF File Repair application. Such DBF Repair tools provide fast, yet safe repair of all logically damaged MS Visual FoxPro 8.0 databases. These utilities do not require any technical knowledge to perform repair.

DBF Recovery Software repairs MS Visual FoxPro 9.0, MS Visual FoxPro 8.0, and MS Visual FoxPro 7.0 databases in just three mouse clicks. It also repairs dBase III, dBase IV, and dBase V databases. The  tool can be installed on Windows 7, Vista, 2003, XP, and 2000 operating systems.