I no longer try this the new ways.

I take the file on my bootable DOS CD and my laptop and walk to the printer to connect it with the parallel cable. Then I use the old COPY /B command as needed.

I know today many can't operate the PC without a mouse so I always have to check what the owner/user/member can do or if they grew up on DOS or prior to DOS.

-> In closing the PRN file is incompatible with any printer it was not made for. Even if you followed the above instructions to the last dot there is still an issue which is "Was this PRN file made for this printer?"

Bob