Hi, Bindu : Thanks for your reply, but I can't find any standard library path including "standard/basic" . Can you tell me the absolute path (in APD 16.6) of the standard library path ? And, is there any manual about these functions such as or . Further more, I can't understand too, the following instruction. Is this means I can define a macro named "CHOOSE_MAX" myself? But I don't see any code or method here. ------------------------------------------------------------------------------------------------------------------- if you do not have the standard library files, please use the following macro: (macro CHOOSE_MAX (Object Measure) "CHOOSE_MAX [object] function/measurement => [object] ------------------------------------------------------------------------------------------------------------------
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