Error 926 means one of the internal modules that the protection check uses couldn't be loaded. The file is called .cm.1 and is written out into the same directory as the working copy of the .cm file. It is in fact a DLL, although not named as such.

Possible reasons are lack of permissions on the directory where the .cm file is stored or a virus checker with "real time" protection holding the file open after it is written for scanning, preventing it from then being opened by the CopyMinder runtime code. In this case, the anti-virus software should be set to exclude the directory where the licence files are stored.