On the subject of range checking, another difference that Mac Pascals implemented was unrangechecked arrays where the lower and upper bound are both 0. That is: type UnboundArray = array[0..0] of Whatever; disables the range check tests for array access. Generally this is used for open arrays as parameters, and it pretty much just avoids having to define a specific maximum array size (which can also get in to trouble, such as: type UnboundArray = array[0..kMaxInt] of Whatever; which can have a size bigger than 4Gig if Whatever has any noticeable size, and which can cause problems (does GPC handle record/array sizes larger than 32 bits on 32 bit platforms?). Anyway, I don't know that this is worth emulating even with --mac-pascal turned on, but I figured I'd mention it while I thought of it and while range checks were being discussed. Enjoy, Peter. -- <http://www.interarchy.com/> <http://documentation.interarchy.com/>