Don't use macros unless absolutely necessary. If lc_printsel contains blanks, your code will break. Use name expressions instead. In this case you should replace &lc_printersel with (lc_printersel).

>An application deployed at customer's site throws an "Invalid Path or Filename" error when attempting to preview or print a report. Except that report was compiled into the EXE. Other customers are not reporting the same error. The line of code is:
>
>REPORT FORM (lc_reportname) to printer &lc_printersel. preview noconsole ; && GreyHawk - 20080701 - add printer selection for preview
> WINDOW (Lo_RepForm.NAME)
>
>Where lc_printersel contains 'prompt' (or empty, depending on customer settings).
>
>Chris.