Feb 09 2011
This post is for my own future reference because I have forgotten about this problem until a recent reinstall of Windows 7.
After a clean install of Windows 7, trying to use compc and/or mxmlc from the Flex SDK through command line may yield a “System Error” message:
It seems like Microsoft somehow forgot to ship this Microsoft C Runtime Library DLL in Windows 7. When installing some programs, this DLL may be installed by the respective installers. If you encounter this missing DLL problem, the only way to fix it is to install one of these programs, or otherwise grab hold of the DLL from somewhere and place it in the correct folder:
For Windows 7 32-bit, place the DLL in
For Windows 7 64-bit, place it in
WARNING: Do not install DLL obtained from untrusted sources. You can actually copy the DLL from one of your old Windows OS installations. If you want to use my copy, here it is.