system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek: Voyager] We know they had a backup for the EMH program which means he could be copied so why did they bother with transferring him back and forth from the mobile emitter instead of just running an extra copy. Wouldn't two doctors be better than one and reduce the risk if they lost one?
gpt
He's an executable program, not merely an inert data file. While plenty such programs are standalone and can be easily copies, many need to be installed in a specific way to work. It's possible that Voy grew lacked the ability to install additional instances of the Doctor.