Thanks for you reply LynB,

The weird thing that happens is like I record a midi as test using my connected keyboard (host to USB)Rewind and play, no problem, sound comes out the keyboard.
I save it as a ...seq or as a midi 0 or 1. Reload that seq or midi back in start play.... crash every time.
I have many midi's created over the years and collected also many. Some of them just play fine and with others the program crashes.
I have honestly no idea what goes wrong.

Regards
Dick