Hello Chief, hello Peter, defining Variables and exporting them DID WORK! I really have to thank you and I express, I do! I will now start my project, it is an old integrated development sytem for Motorola M6800 Microprocessors including an assembler and a simulator, first started in 1981. Thank you again (I learned a bit) Mathias Uhle -- mathias.uhle@tu-dortmund.de