All of this, and yet I still don't know what this error message means.
I did some Googling, and there were suggestions that it had something to do with a buffer overflow, but that sounded like a generic response. I had left MMSSTV running for a few hours before I saw this. It doesn't really matter that much, as restarting the program was all that it took to bring it back up, but I am always intrigued by obscure error messages.
Back in the days of the Arpanet, there was a program that ran on the college PDP-10 that would die with the message "La banda esta borracha", which apparently meant something like "the band is drunk". I don't recall what the program was or what error prompted the message.
There is a Lunix program called "strings"; it uses a heuristic to detect text strings in a file. I think I will run it on MMSSTV.