Error 71

[Iman Rahimi]

Hello everybody

my program has an error with the title Error 71

the symbol shown has been declared as an equation ,but no symbolic equation (..) was found.look for commas in the documentation text for the equations.use quotes" 

"around the text or eliminate the commas

However I have checked my codes several times and correct every thing but I can not do correct it.

some of my codes are as below:

objective2..z2=e=1-d1("p1","j1")+1-d2("p1","j2")+1-d3("p1","j3")+ 1-d4("p2","j1")+1-d5("p2","j2")+1-d6("p2","j3")+1-d7("e1","w1")+1-d8("e1","w2")+1-d9("e1","w3")+ 1-d10("e2","w1")+1-d11("e2","w2")+1-d12("e2","w3");                            

;/model  networkDEA_model/all

;Solve networkDEA_model  using MINLP Maximizing z2 

It would be helpful for me if any body could correct my codes.

Thank you in advanced

[Renger van Nieuwkoop]

Hi Iman

If you only send a part of your code, it is hard to look for the error you describe.

See the guidelines on how should try to get some help in this group.

Cheers

Renger

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[Iman Rahimi]

Hello dear researchers

I have a GAMS code which possesses Error 71 when I want to execute

?I do not know how can I correct it.Can anybody help me in this  regard

I have attached my codes

[dharmender yadav]

Hi,

PFA your gams file after correction.

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[Tino]

Dear Iman jan,
where is equation named "const25" ?
Check the attachment, without 25 it works.

[Ali Reza Bahari]

Hi Iman

equation 25 which is declared in equation statement, has no symbolic equation(i.e it isn't defined). I just remove it from declaration statement and from equation list of your model.    

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[Loveness]

Hi,

I noticed from gamsworld that you assisted someone with the error 71. I am trying to follow but it is not clear to me. I am trying to understand the example below and failing to correct it. Please help me to know how the example code below can be corrected on the link  below. 

http://www.math.ku.dk/kurser/oa/gams/docs/bigdocs/gams2002/shorterr12.gms

thanks

[Arman N]

If you have an equation in Equations part you must have the "equation.." in constraint parts..

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[Loveness]

Thank you very much. I resolved that error.