Error for datawindow get data from temp table with SP

I create a SP to produce results. In this SP, results recorded in a temp table #mytemp. The final sql in this sp is like:

select * from #mytemp

Then I create datawindow to display data from this sp and got following error:

Number 277 Select Error: there was a transactin active when exiting the stored procedure 'myproc'. The temporary table '#mytemp' was dropped in this transaction either explicitly or implicitly. This transaction has been aborted to prevent database corruption.

How to resolve this problem?