If the error is "You must specify overhead applied account in General posting setup......." then simply go to the general posting setup, look for the combination line of General Business Posting Group and General Business POsting group shown in the error message, and select the "Overhead Applied" account there.
This must have occured as you have defined overhead percentage for some item entered in Purchase Invoice.
Answers
This must have occured as you have defined overhead percentage for some item entered in Purchase Invoice.
Deep
India