File corruption in Jet file-sharing database system

Microsoft Jet database is a file-sharing database system. A file-sharing database system means that the processing of the file occurs at the client. In order to allow multiple users to share the same file over the network, Jet Database Engine uses a Lock file (.ldb) to synchronize the read write operations of the database. When a file-sharing database, such as Microsoft Jet, is used in a multi-user environment, multiple client processes use file read, file write, and file locking operations on the same shared file across a network.

If a process cannot be completed, the file may be left in an incomplete state or in a corrupted state. When you use Microsoft Jet in high-stress applications such as Microsoft Internet Information Server (IIS), you may experience any one of the following problems:

• Database corruption
• Stability issues, such as IIS crashing or locking up
• Sudden failure or persistent failure of the driver

Opportunistic locking may increase the risk of Jet database corruption when a file is shared by two or more clients on a network file server. Most of the times, the network problem leave the Access database in a “Suspect” state and cause corruption. In all of these situations, you need to repair your Access database in order to use it.

If you disable opportunistic locking, this may adversely affect the performance of other applications. To get rid from this solution you can install latest service pack provided by Microsoft or latest Jet hotfix service pack. Problems also occur when you restart the server after you apply new software or you apply a service pack or a hotfix, and you forget that the Microsoft Jet database is currently shared on the server. In this situation you need a tool called access recovery tool which have capability to repair your Access database.

These softwares work on the header of the corrupted file and repairs and restores it without changing the original contents of the database files. Stellar Phoenix Access Repair is best data recovery software to restore your corrupted database by fixing bugs and errors. Using this utility you easily repair forms, queries, table, modules and macros. Stellar Phoenix scans for corrupted files to repair and restore it to a default location or a user specified location on the hard drive. It is compatible with all file versions of Microsoft Access such as Access 97, 2000, 2002, 2003 and 2007.

Jet Database and Access: Unrecognized Database Format

A Jet Database Engine serves as the underlying component of a database and all the information is stored on it in the networked scenario. Any wrong thing happened to it, can lead to the corruption of database and in most of the cases where data corrupted is of much importance, needs to be repaired. Any corruption in Jet database engine lead to following two common errors:

• The Microsoft Jet database engine stopped the process because you and another user are attempting to change the same data at the same time.
• Unrecognized database format 'databasename.mdb'

In jet database engine first error message may displayed when the long value column has bad data stored in it. The page in which the row is stored differs from the one in which the long value is stored. “Unrecognized database format” error in jet database engine may come when Jet Database Engine improperly shuts down while the process of writing down to the disk that cause corruption in jet database engine as well as database file. This error mainly comes in access 2000 and access 2002 use the Jet 4.0 engine which creates Jet 4.0 format database files. Jet 3.5 components do not recognize such a format. Also due to misplacement of an index on the MSysObjects table, an error message is encountered that announces

To fix this problem you should install Latest Microsoft Jet database engine hotfix pack and use compact and repair utility provided by it. You can workaround with this installing Visual Studio Service Pack 4 or later. For ADO (or the ADO Data Control), use the Microsoft.Jet.OLEDB.4.0 provider. But sometime data is critically damaged and we can’t repair it using these utility. In this situation we need powerful access repair software which fixes every error that cause corruption and repair our important database.

Now you can google for access recovery software easily but we don’t know which software will provide full repair on our database file. In these circumstances I can suggest you power full Access or .mdb repair software which is Stellar Phoenix Access Recovery Utility. Its main feature it works on every version of Microsoft access including Access 97, 2000, 2002/ XP, 2003 and 2007 and perform thorough scan for repairing database file. Demo version of this software shows you repaired database.

Microsoft Access can't find the database file” Error in Ms Access

Some predefined action is an efficient way for programming in any programming language. When we talk about MS access we consider Macros as predefined actions.. Macros can perform a number of the common tasks same as Visual Basic code to perform in MDB file. As MDB and macro has some limitations so we prefer module and MDE files over macros and MDB file. Now we should know about MDE files. MDE file format allow you to limit database users from modifying database application that make your data more secure. You can’t edit, delete or modify MDE files. The MDE format allows you to store the same information that is contained in MDB files except that the underlying VBA are pre-compiled and stored in machine code. We can’t contain macros because macros do not provide error-handling capabilities. For converting your MDB files to MDE files, we recommend you to split your database and convert front-end to MDE format. An MDE files compiles all modules, remove all source code and make your database more compact and secure.

Converting a MDE file to MDB file has some limitations. Although it protects your application from modification or theft, If you want modify your MDE file then you must convert in MDB files. In process of converting MDB to MDE file we lost our macro. We always recommend you to make backup of your MDB file before converting it into MDE files. Sometimes you get common error messages

“Microsoft Access can't find the database file '.MDB.' Make sure you entered the correct path and file name.” If you have your operating system configured to hide MS-DOS file extensions, when you try to export a Microsoft Access 97 object to an MDE file you may receive above message. There is strong change to loss and corruption of your MDE files. For this you have to recover your database file macro so that you can convert MDE files to MDB files. If you have large no of macros we have nice solution for you to repair access file by recovering macros.

Go to macros menu on the tools menu in access. From here you can regenerate some VBA code from the macros choose “convert macros to visual basic”. After this you have to edit VBA code for compiling.

-->Create and MDB replica or carbon copy of your MDE file using tool menu.

-->Make MDB replica to MDB file by choosing recover design master.

-->Choose MDB files and run Stellar Phoenix Access Recovery Software.

-->Now you can import everything from MDB file.

-->Search for macros in recovered MDB file and highlight them now Highlight each macro in the recovered database and choose “Convert Macros to Visual Basic” from the Macros menu on the Tools menu.

With the help of above method and Stellar Phoenix Access Repair software you can recover your macros from MDE files without loss of your important database. This software is easy to use and compatible with all version of access. It proves you fast recovery and supports file versions of MS Access including Access 2000, 2002, 2003 and 2007.

Recover macros from MDB files in Ms Access

A macro is a group of predetermined actions that make Tables, Queries, and Reports perform in a particular way. Macros are very useful for automating simple tasks for simple click of command button. You don't need to know how to program use macros. Macros can perform a number of the common tasks same as Visual Basic code to perform in MDB file. But we prefer module over macro. The key difference is that modules can be written to trap and cure errors, while any error in a macro brings operations to a halt. Error in macro means corruption of your database. When you are entering data in a form, you may get this error message “Microsoft Access can't find the macro”.

Common cause of macro error is inadvertently type one or more spaces in event properties of a control or form. Either the Menu Bar or the Shortcut Menu property of the form refers to a menu bar that does not exist in your database. 2^nd cause is if you ever run a macro against the wrong type of document. To solve these problems, check that you've spelled the macro variable name right and that you are referencing it in an appropriate scope. You can also check the opening or closing parenthesis or omitting an argument or specifying an extra argument. Best way of preventing data loss from macro is to backup your database or you can use compact and repair utility. But, these utilities have some limitation. If you don’t know the exact problem of macro then this utility may reduce physical size of your database.

If you still facing the problem and don’t have any other option then you go for some data recovery software. For getting exact duplicate of your data you need access repair software. Stellar Phoenix access recovery software is best recovery software for MDB files. Stellar Phoenix Access Recovery helps you recover data not accessible due to corruption in Macros, Access databases, Tables, Queries, Forms, or Reports. It repairs macros common and complicated error with scan of whole MDB files in order to locate all the damaged files. This software compatible with all versions of Microsoft Access including Access 97/2000/2002/XP/2003/2007.

Preventing Database Corruption And Repair Access Database

Database Corruption occurs when error comes in accessing database due to change in the binary file format of a particular database. You may not be access your database after database corruption. MDB file corruption is very common even MS access fix minor corruption issues. If you will not fix database corruption then it spreads and get worse over time.

There are number of reasons for corruption of your access database. Most common are software conflicts, jet software conflicts and hardware failures. In software conflicts occurs when access installs 3^rd party plug-ins, that lead to error in access database. Any hardware failure in your machine can cause applications to crash and unfortunately jet database are sensitive application crash. This may cause loss of important database.

For preventing this type of errors, we use some standard tricks. Always use original softwares, make backup copy of your database, store temporary table in backend, be careful with wireless networks, and troubleshoot network hardware. If you follow this precaution, you will never suffer with database corruption. Worst scenario is that after all this precaution you lost your mdb file or access database file. Now you must have recovery software for access database or you can use access repair software.

Stellar phoenix access recovery software is most powerful access repair software. With the help of this Access Recovery software you can repair your Access database in all possible cases of Database corruption. This software gives you a 100% assurance of access file repair and restores them with maximum efficient way.

How To Deal With Error:VBA Project Is Damaged

As VBA file depend upon source code, any deletion in source code can corrupt VBA file. Most common error for VBA file is “VBA project is damaged”. This problem comes up only if you try to convert an Access 97 database to Access 2002. Main cause of corruption is that Access 97 is not in a fully compiled state. If errors indicate corruption due to a Visual Basic Application (VBA) or macro, you may recover the affected tables, queries and macros by exporting them from the corrupted database and into a new database

Compact and repair has some limitation. Some objects must be recovered from backup. Second method is open your database in Access 97, and issue a Compile and Save All Modules from the Debug menu in VBE before attempting to run the conversion process again..

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How to Repair Your MS Access Database

Microsoft Access a tool for creating database in offices, home, everywhere and storing them in a database format. Due to user friendly it is very useful to us. In process of database creation of fetching data for your database application, there are many times when you may come across error messages when user interaction takes place. Sometimes error messages in Microsoft Access may appear completely unpredictably or at sometime due faulty network, interrupted write operation or saving a database file in another program.

These errors can lead to database corruption and damaging precious data. This is most panic situation when you have to do some urgent updation in your database and you can't do it because your database is corrupt. Don't panic lots of options are available for you to recover or repair your database such as compact and repair utilities....

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