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PRB: "Wrong Version Of Run-Time DLL" When Starting Application

This article was previously published under Q185992
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
When starting a Visual Basic 5.0 application, you might receive thefollowing error dialog box:
"Wrong Version Of Run-Time DLL"
The wrong version of the run-time file, Msvbvm50.dll, is installed on thetarget machine.
The most recent version of Msvbvm50.dll must be installed.

To resolve this problem, install a Visual Basic 5.0 application built usingthe Application Setup Wizard onto the target machine, or manually copy themost recent version of Msvbvm50.dll into the System directory (or System32for NT machines) and register it using RegSvr32.Exe.

To register the run-time file manually, use RegSvr32.Exe (shipped on theVisual Basic CD in the OS\System and Tools\RegUtils directories) asdemonstrated below:
  1. On the Windows Start menu, click Run.
  2. Type in the following and press ENTER:
    RegSvr32.Exe MSVBVM50.DLL
    You should see a message similar to the following:
    "DLLRegisterServer in C:\Windows\System\MSVBVM50.DLL succeeded"
  3. If you do not see this message, please make sure you have the most recent version of Msvbvm50.dll and you have RegSvr32.Exe installed in the Windows System or System32 folder.

    NOTE: It is also possible to obtain all of the latest run-time files by installing the self extracting EXE referred to in the following Microsoft Knowledge Base article:
    180071 : FILE: Msvbvm50.exe Installs Visual Basic 5.0 Run-Time Files
This behavior is by design.
The Application Setup Wizard should always be used to distribute yourVisual Basic 5.0 applications (or an equivalent third-party distributiontool). This ensures that the necessary support files are brought along andinstalled on the target system.

When compiling a Visual Basic program, the final output requires either therun-time file that is installed upon the development system (or a morerecent run-time file). Older applications are not broken by newer versionsof the run-time file, but newer applications are broken by older versionsof the run-time file.

However, sometimes the wrong version Visual Basic 5.0 run-time file canstill be installed on a system and lead to the above error message. If theNT Option 4.0 or Internet Information Server 4.0 is installed, there is thechance that an older version of the run-time file will be installed.

There are currently two versions of the Visual Basic 5.0 run-time file:
     Run-Time File     Version           Ships With     -------------------------------------------------------------------     Msvbvm50.dll      5.00.3724         Visual Basic 5.0                                         Visual Studio 97                                         NT Option Pack 4.0                                         Internet Information Server 4.0     Msvbvm50.dll      05.00.4319 (SP2)  Visual Studio Service Pack 2                                         Visual Studio Service Pack 3				

If you have installed the most recent version of the Visual Basic 5.0 run-time file, installing either the NT Option Pack 4 or Internet InformationServer 4.0 results in the older version of the run-time file replacing themost recent version, and all Visual Basic 5.0 applications compiled underService Pack 2 or 3 will break.
kbDSupport kbdss kbAppSetup

Article ID: 185992 - Last Review: 12/10/2003 22:43:26 - Revision: 2.0

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