Problem: Error Msg – Cannot Perform This Operation on a Closed Dataset
Solution: When this happens, the user is most often trying to create a new sale, though not always.
The most likely culprit is one or more empty response files.
To confirm this, with DataLog closed, go to the drive (usually C) where the following is found:
(My)Documents\My UAAR\My Sales\.Configuration Files
Search for files with 0 kb size and delete them.
Reopen DataLog and create a new sale to ensure that DataLog works properly.