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Posted: **Thu Oct 15, 2020 3:40 pm**

Hi everyone,

I keep having error 66 and 256 consequently.. I will appreciate your help. Thank you very much.. In the model I need to minimize the maximum of something, you will see in the code below

Untitled_6.gms: (1.76 KiB) Downloaded 193 times

error 66: The symbol shown has not been defined or assigned

Posted: **Fri Oct 16, 2020 10:45 am**

Hi,

When you look into the lst file, you will find the following error message:

Code: Select all

 66  solve data_envelopment  using lp minimizing M;
****                                               $66,256
****  66  The symbol shown has not been defined or assigned
****         A wild shot: You may have spurious commas in the explanatory
****         text of a declaration. Check symbol reference list.
**** 256  Error(s) in analyzing solve statement. More detail appears
****      Below the solve statement above
**** The following LP errors were detected in model data_envelopment:
****  66 equation normalization.. symbol "y" has no values assigned

Maybe you forgot to assign values to parameter y?

I hope this helps!

Fred

Posted: **Fri Oct 16, 2020 2:24 pm**

thank you very much Fred!

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error 66 and 256

error 66 and 256

Re: error 66 and 256

Re: error 66 and 256