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On Fri, 1 May 2009 08:15:49 -0700 (PDT), Danny Ross Lunsford wrote: >What exactly are you trying to accomplish? Derive is just a sort >of LISP. The primitive element is the list. I have written a 30 line Derive program in a *.mth file. It has statements to set the Derive state. It has sets of 3 assignments that I want on a single line (so I can do easy cut and paste) to set global variables. It has a function definition. It has a function invocation. I start Derive. I File, Open my *.mth file. I Simplify, Basic the last line (the function invocation) which runs for several hours. After the function runs and I save the results (File, Write, C), I edit the *.mth file and cut and paste the 3 assignments to another set of values. In Derive, I then File, Close, no save -- clear out previous run File, Open, my *.mth file Simplify, Basic the last line (function invocation) --- Fred J. Tydeman Tydeman Consulting [log in to unmask] Testing, numerics, programming +1 (775) 358-9748 Vice-chair of PL22.11 (ANSI "C") Sample C99+FPCE tests: http://www.tybor.com Savers sleep well, investors eat well, spenders work forever.