>My guess is that when the Registry.prg was written, the system was 16bit. The thought of a string being over 256 was unheard of. But, now, in the new world, it it safe to have larger strings.
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Even early 32-bit NT based OS for a long time had problems with long path names: try copying a dir where length(compound_dir + fname + ext) is near 250 to a dir on USB with a long dir like: MachineIdentification_UserIdent_SafetyDate\
You will run into errors ;-))