Why do i see an error message „mfc100.dll not found“?

Error description

After the GP Manager starts a message like:  „Mfc100.dll not found“ is shown.

Cause of error

This file is part of the „Visual Studio redistributable Packs“ (vcredis). The most common cause for this message is a missing installation of one Vcredist package.

Another reason is, that the file is deleted. This might have happened by accident or if your computer is infected with a virus.


The Vcredist packages are distributed together with the GP Manager. If you have a GP Manager installation the packages should be inside the installation folder.

  • Open the folder where the GP Manager ist installed („How to find the GP Manager installation?„).
  • Open the GpTools Folder.
  • As the packages are not cumulative you will have to make sure each package is installed. Simply run each installation and follow the descriptions during the installation.
    • Vcredist_2008_SP1\vcredist_x86.exe
    • Vcredist_2010\vcredist_x86.exe
    • Vcredist_2013\vcredist_x86.exe
  • Try again to start the GP Manager

If the problem still exists contact the GeBioM mbH Support.