Softimage user Torsten sent me this tip:
I found out a hint to stop playback: press the down arrow and click on the XSI taskbar button at the same time.
eX-SI
ICE, scripting, and other tech stuff about Softimage aka XSI
Softimage user Torsten sent me this tip:
I found out a hint to stop playback: press the down arrow and click on the XSI taskbar button at the same time.
eX-SI 
hmm. didn’t get that. i often go to windows taskbar, rightclick close SI. the simulation stops and it asks if i really want ro close. hit no and continue. only works if scene is NOT saved at current state.
sometimes the home button works. but the fact is that heavy sims are a pain to stop =/ that should be improved and we should not relly on workarounds.