The Asm( command is used for running an assembly program. Unlike TI-Basic programs, assembly programs are written in the calculator's machine code directly, which makes them more powerful in both speed and functionality. However, it also means that if they crash, they crash hard -- there is no built-in error menu to protect you.
Keep in mind that many assembly programs these days are written for a shell such as Ion or MirageOS. If you're dealing with one of those programs, calling Asm( on it will do nothing; you need to get the appropriate shell and run that instead.
- ERR:INVALID is thrown if the program isn't an assembly program.