DETAILS PQL gets confused during execution when debug is on and a subprocedure is executed by way of an expression for the subprocedure name. The example gives Missing subprocedure definition. (Error 730 - SP1) When run. EXAMPLE PROGRAM program debug c . execute subprocedure ["SP"+"1"] c subprocedure sp1 | sp1 . write "SP1" end subprocedure c end program WORKAROUND Remove the debug option or run using the gui debugger. It will also work if the subprocedure is within a subroutine.