I came across an interesting bug with MS Outlook 2003 experienced with a client today.
PROBLEM
Outlook fails to open or save email attachments with the error “Can’t create file”, and suggests possible permissions problem. However, creating a file from any normal means will work without a problem.
SOLUTION
If more than 99 files exist in the outlook temporary directory which have the same attachment name, they will be named FILENAME(#).EXT. However, once the number # reaches 99, outlook will be unable to create any more files and the error occurs.
Location of dir can be found in:
HKEY_CURRENT_USER\Software\Microsoft\Office\${VER}\Outlook\Security
Found in:
C:\Documents and Settings\${USERNAME}\Local Settings\Temporary Internet Files\OLK2BC
RESOURCES
More indepth details on this problem:
I haven’t located any Microsoft KB articles about this issue, but I don’t care enough about their software to spend time trying to find it. :-)