Thanks for your email! Unfortunately, I couldn't find much useful information in the logs. I did locate the error reports you submitted in our bug-tracking system - the bug report reference is SP-3412, for future reference. We thought we'd fixed it in the release of SQL Prompt 5.1, but we've had reports from you and another user in newer versions recently.
I see from the comments you've added that you get this problem with snippets as well - is that still happening? Can I check what version of SSMS you're using?
Andy Campbell Smith
Red Gate Technical Support Engineer