The model has a different constraint for the first element of a set (say
PERIODS) than for all remaining elements.
I have defined three sets:
INITIAL_PERIOD;
OTHER_PERIODS;
PERIODS := INITIAL_PERIOD union OTHER_PERIODS;
when MathProg is generating the model and specifically constraints over
the PERIODS set it terminates with the following error
cannot convert JAN to floating-point number
where JAN is the first period in OTHER_PERIODS
How should the model be written in MathProg to allow different
constraints for the first element.
Thanks
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