Thanks for your responses. No wonder I don't recall this happening before. I have a feeling it might have to do with running Band-in-a-Box on Leopard (10.5) and a PowerPC processor. What I will do for now is use my Intel iMac to edit parts and then play the parts back on the PowerPC when I am at school. Fortunately, I run Back to My Mac and can access the Intel iMac from school.

Time to buy a new MacBook Pro! :P

I use Band-in-a-Box only for practicing over chord changes and whatnot--don't need any fancy-snazzy.

And just to inform, the "Chord Settings" dialog box DOES open on whatever measure I select BUT when I click on the radio button for beats 2,3,4, etc., that is when the good old spinning beach ball appears and then crash, the above-mentioned error message pops up.