SUM-Problem

Problems with syntax of GAMS
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sph_93
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SUM-Problem

Post by sph_93 » 3 weeks ago

Hello Everybody,

I have tried a model with an objective function and some secondary functions.
grafik.png
With these two secondary functions, I get errors again and again and I do not know why.(Error125,171)

This is my written code for the two functions:
grafik.png
I can't find anything in the error descriptions of Gams that can help me with this problem.
I hope you can help me. Thanks a lot

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bussieck
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Re: SUM-Problem

Post by bussieck » 3 weeks ago

I think the message from the compiler for error 125 is pretty clear: Set is under control already. The cursor is under your r. You already control r on the equation, so you can't sum over it. You probably want an alias of r. Check out aliases in the GAMS documentation: https://www.gams.com/latest/docs/UG_Set ... mesForASet.

-Michael

sph_93
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Re: SUM-Problem

Post by sph_93 » 2 weeks ago

Hello, Michael,

thank you for your prompt assistance. The equations are now without errors. But I have another problem now. I have declared the parameters with values, but when I execute the model I get the value 0 for the target function.
Can you help me with that?
Untitled_6.gms
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bussieck
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Re: SUM-Problem

Post by bussieck » 2 weeks ago

No, not really. If your program does not do what you expect than you need to debug. You are best suited to do that. You know what you want and you know what you programmed. For someone else to dig in is very time intensive. Good luck.

-Michael

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