Over the last few days, I have been having a lot of problems trying to write Lotus Notes .NET applications in Windows Vista. I had no problems writing the apps under XP, but since upgrading I kept getting error messages like “Unable to find user id file” when trying to initiate a Notes Session. The problem was with Windows Vista Virtual Store!
Installing Lotus Notes on Windows Vista, seems to be a normal installation. But when you launch Lotus Notes for the first time, it will start to write the notes.ini file and your id file (plus some other user related files…) to the following location: C:\Users\username\AppData\Local\VirtualStore\Program Files\lotus\. I never realised this before, until a colleague told me that Lotus Notes wrote files to this folder! With Lotus Notes writing to this folder, it made my .NET applications stop working!
The way to fix this, is to browse to: C:\Program Files, right click on “lotus”, go to the security tab and Edit the permissions for “Users” to Full Control. Apply the security settings. If you then copy the lotus folder from the VirtualStore to the normal Program Files folder, you will not lose any of your setting:
Copy: C:\Users\username\AppData\Local\VirtualStore\Program Files\lotus\ To: C:\Program Files
You should now be able to delete the lotus folder from the VirtualStore (or just rename the lotus folder to lotus.old if you are worried about losing the data – this would be useful to see Lotus Notes recreates the folder in the VirtualStore).
Lotus Notes should now not use the Virtual Store, and your .NET apps should run without any error.