>In a runtime VFP Command Window, I use the MODIFY COMMAND,
>open a PRG and change the PRG.
>When I click on File / Save As, sometimes the PRG name is
>in the Save As dialog box but it has no ".PRG" extension.
>If I go ahead and hit SAVE, sometimes the file is saved
>without an extension.
>How can I improve this?

Never seen this happen in any version of FoxPro.