In FPD/FPW do nesting limit was 32. Read nesting level limit was 5.

>The help file says this... "The DO command limits nesting to 128 levels." You can't DO a program and from within that program, DO another, etc more than 128 times. In FP DOS it was limited I think to 5... you may want to evaluate your program and come up with another method of accomplishing your goal.