My mugen keeps crashing

[Tenspeed]

I get an error after it crashes that says "Assert Failure in charsel.c line 3162"

anyone know what this could possibly reference? it seems to happen randomly. I've tried each of my characters one at a time, and even the stages, and they work, but sometimes in arcade or survival mode usually it just randomly happens.

[Fallen_Angel]

If I remember , these error its because the char doesn't have a stage on the select.def, you only need to add them one and if you dont want to asss any stage just put random after the char like these   kfm, random