1. Make a backup of that mailbox.
2. Delete the file named newmail.cac
3. Verify that the file in question indeed has the correct filename extension (which presumably is .PMM). If not rename it. Try opening the folder again.
4. If it still doesn't work, get the mbxmaint utility from your Pegasus installation, or download it from here:
http://community.pmail.com/files/folders/utils/entry25339.aspx
5. Run a check on the folder. If mbxmaint reports a problem, run a repair. If possible, close Mercury and Pegasus while doing this.
/Rolf
<p>1. Make a backup of that mailbox.</p><p>2. Delete the file named newmail.cac</p><p>3. Verify that the file in question indeed has the correct filename extension (which presumably is .PMM). If not rename it. Try opening the folder again.</p><p>4. If it still doesn't work, get the mbxmaint utility from your Pegasus installation, or download it from here:</p><p><a href="http://community.pmail.com/files/folders/utils/entry25339.aspx">http://community.pmail.com/files/folders/utils/entry25339.aspx</a></p><p><a href="http://community.pmail.com/files/folders/utils/entry25339.aspx"></a>5. Run a check on the folder. If mbxmaint reports a problem, run a repair. If possible, close Mercury and Pegasus while doing this.</p><p>/Rolf&nbsp;</p>