I am using Vista HP32bit (HP) with WLM Build 15.4.3555.0308

The error in title appears sometimes when switching from mail to calender.

I searched the forum and found the following answer.

Close Windows Live Mail
Start up regedit, and look for this key in the left pane:-
HKEY_CURRENT_USER\Software\Microsoft\Windows Live Mail
In the right pane look for the DWord:-
Calendar UI View State
and delete it.
Close regedit and restart Windows Live Mail

I did this but without success.

The key is recreated.

Any other help please.

David