Problem: after importing messages from Windows Mail to Outlook, you receive the following error message when reading email:
The custom form cannot be opened. Outlook will use an Outlook form instead. The object could not be found.
This shows up with each message imported into Outlook 2010 from Windows Live Mail. After clicking OK the popup disappears and you can read the email, but the popup is annoying.
Clearing the forms cache should fix this problem.
In Outlook 2010 and newer:
- Go to File, Options, Advanced.
- Click Custom Forms (about halfway down).
- In the Custom Forms dialog box, click Manage Forms.
- In the Forms Manager dialog box, click Clear Cache.
It can also be helpful to rename (or delete) FRMCACHE.DAT to FRMCACHE.old. Outlook will recreate this file when needed.
Type or copy & paste the line below into the address bar of Windows Explorer and press Enter.
Then rename the frmcache file.
If the problem continues, change the form (message class) associated with the messages to the IPM.Note. To do this, download DocMessageClass and run it on the Inbox (and any other affected folders).