Error 56

Problems with modeling
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boloness
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Error 56

Post by boloness » 1 month ago

Hello Everyone,

I am writing because I have an issue that I just have discovered when I started to implement my model in GAMS.

I would like to solve an MIP Problem using MIP but I have non - linearity occuring because of two binary variables in one equation and an error 56 occurs.
The picture attached presents my equations.

Equation 10a

How do you think I could rewrite the equation 8b so it is being solvable by MIP ?


Thx
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image.png

Fred
Posts: 151
Joined: 2 years ago

Re: Error 56

Post by Fred » 1 week ago

Hi,

If PA and W are binary variables, you are basically looking for a way to model the "product of binary variables". If you google for that, you should get lots of helpful results like e.g. http://yetanothermathprogrammingconsult ... ables.html

I hope this helps!

Fred

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