#1
my power tab keeps say 'not enough memory to run this file, please exit other windows and try again'. and then it say 'unable to play MIDI stream file'.

Help????
#2
Do you have a lot of programs running at the same time? It could be that all your memory is in use (including virtual memory). Try exiting some programs and seeing if that makes a difference.
#4
Hm. Does it do it with every file or just one specific file? And is this a recurring problem or have you only just encountered it? I've never come across that problem with Power Tab before (though I have with other programs).