Our AR person keeps getting fatal errors with some invoices
 
 
Fatal Err - File:  WBLOOKUP.SRC line 5592
There is a fata problem with the following expression. The problem may have to do with parentheses: ( MTLOT.LOC = " " _.A. (MTLOT.ONHAND > VAL("0" ) )
OK.
 
She will re-try posting the invoice, and it will throw up a warning error box that just has a yellow warning triangle with an exclamation point and and OK button.  It will just keep throwing up the box until she has to kill the evoerp process.  Then it hangs up her process so she has to go into Pervasive Monitor and kill that, then she can continue
where she left off after going back into Evo.
 
Related:
 
SO-G-A showing the box "Posting Invoice No.  and From Sales Order No. and the numbers for both are not numbers we use (like is says SO # 35550, but our Numbers start with 1522, and the invoice number says 36579 and our 101...So not sure where these are coming from?
 
How do I figure any of this out?  
 
Val