Thanks Ievgen,
[quote user="ievgen Miroshnikov"]
Usually select statement does not block delete statements, are you sure that you identified blocking statement ?
[/quote]
I am pretty sure, few times i just kill that session and it released other statement to process.
However, I will check again when it happens again next time as i can't reproduce it in Test environment so far.
[quote user="ievgen Miroshnikov"]
Also with preprocessed reports you may have bunch of records not deleted from temp tables, that are not real temp tables, so deleting them manually (from SQL or x++) may fix this issue.
[/quote]
I will check this out too, thanks.