Interesting, I couldn't get the command line to work either. Even though it says how to do it in the help file.

Well, here's a couple alternatives.

In the same folder as mpasmwin.exe, open the MPLAB.INI file and modify or add this line.

CaseSensitive=OFF

-- or --

Start the MPASMWIN program directly by clicking on it in windows explorer, or type MPASMWIN from a DOS window.

Unselect the "case sensitive" checkbox then click "Exit".

Then try to compile again.

HTH,