I thought that might be the case. I'd like to eventually change to 64bit: some things that the author has said in the NPP forums indicate that the 32-bit version might not continue to be maintained, long-term; and on rare occasions, I have a file big enough that the 64-bit can open that 32-bit cannot. For now, I just keep a portable version of 64-bit, but use 32-bit as my daily. I guess if I ever do switch, I could keep an old 32-bit for tasks like this. (Usually, I can debug my scripts with simple print statements, but every once in a while, there are things that are just easier to find single-stepping, and using NPP as my interface is so much easier for me than the raw perl debugger. For those situations, I'm really thankful for your instructions.)