Animation problem

[Leslie]

Under the given circumstances endless animations stop. This is hard to reproduce:

- rotors etc. designed for endless work never stop.

- animations not designed for endless loop can stop: like suit wearer (telefon animation). Canadair Jet CRJ 200 and all other similar planes can stop, but:

turbines work properly. Positionlight and for eg. flugzeugnase can stop if you set to endless.

Sorry, I can not determine circumstances. I watched for 2 weeks and only I know that you have to edit something in layout. Not this plane but anything.

If you set 10 similar animations at different objects then all stops at once (and normal animations remain untouched) but I do not know which event stops them.

What kind of problem is this?