Dave
Thanks for the assistance. My hard drive seems to be fine, here are the numbers from the properties menu
Capacity 84.7
Used space 61.3
Free space 23.4
Thát's over 1/4 free, so perhaps this is not the problem
I tried to recreate the problem by running several HDZIP songs in quick succesion from the main menu and from the Edit song menu, no problems.
I also ran Microstudio, no problem.
I am sort-of-sorry the problem did not come back
Good luck, let me know if I can be of any further assistance.
bandl