Quick Guide to Fix “A form region cannot be opened”
The Custom Form Cannot Be Opened Outlook. In the forms manager dialog box, click clear cache. If starting outlook in safe mode works try disabling the addins in outlook and check.
Quick Guide to Fix “A form region cannot be opened”
In the forms manager dialog box, click clear cache. If starting outlook in safe mode works try disabling the addins in outlook and check. Try creating a new profile in outlook and check. Go to file > options > advanced > custom forms. Check if microsoft outlook item uses a correct form. Type your computer user name in the above location. Try to manually clear form cache. If the above steps do not work, try the following: This will make sure that, in the case of using a custom form, the latest published version of your custom forms gets loaded again. To start outlook in safe mode hold the ctrl button on the keyboard and then click on the outlook icon.
Go to file > options > advanced > custom forms. In the forms manager dialog box, click clear cache. We tested all suggested solutions and found out our av scanner trend micro apex one (14.0.8) it's the cause. To start outlook in safe mode hold the ctrl button on the keyboard and then click on the outlook icon. Try creating a new profile in outlook and check. If this doesn’t work, proceed to the next solution listed below. Try starting outlook in safe mode and check if the same issue persists? It can also be helpful to rename (or delete) frmcache.dat to frmcache.old. If starting outlook in safe mode works try disabling the addins in outlook and check. To clear the form cache, perform the following steps: If the above doesn't work, as you have mentioned in your post, we can try to resolve this by deleting all the frmcache.dat file and folders that are in the forms folder:
