The MS Reference:
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q232303
The Frmcache.dat file is created during the initial configuration of
Windows Messaging, either by the Microsoft Exchange Setup Wizard or later
when you add thefirst service. The Frmcache.dat file contains standard
forms and other information that Windows Messaging uses to perform tasks
such as displaying and sending messages. If the information associated
with a particular task is missing or damaged, you receive an error message
when you attempt to perform that task. If all other information in the
file is not damaged, Windows Messaging appears to function properly when
performing all other tasks.
The size of a valid Frmcache.dat file is usually 16K or larger. Many
programs add information to the Frmcache.dat file when they are installed,
causing the file to increase in size. The Frmcache.bak file is created
when the Frmcache.dat file is first created and is typically not modified
when a program adds information to Frmcache.dat file. Therefore, if you
replace the Frmcache.dat file with the Frmcache.bak file, any information
added to the Frmcache.dat file is lost. This information must be replaced
manually by reinstalling theprogram that originally added it.
The following situations can cause the Frmcache.dat file to become damaged:
- You backed up and restored the files on your computer, but long file
names were not recognized correctly. After the files were restored, the
path for the Program Files\Microsoft Exchange folder did not match the
associated registry entries.
- Your computer contains a preinstalled copy of Windows 95. When an image
of Windows 95 is placed on a hard disk, Windows Messaging may appear to
be installed correctly, but the Frmcache.dat file may not have been
created correctly.
