Error: context: param

[khan]

Dear All,

I have defined the parameter as: 

Definition:

param m:=3;

param Pm_min{m in M};           

param Pm_min := 1 0.2 2 0.3 3 0.5;

But I dont know when I run it using NEOS. It gives me following error message: 

Error:

Error: context:  param Pm_min{m  >>> in  <<< M};           
processing data.
processing commands.

[Alessandro Oscar Gilardino Arias]

You should write in this way

set M :=1..3;

[Muhammad umar]

Thank you very much for your response. I did like this:

param m:=3;
set M:=1..m;

param Pm_min{m in M}; 

This part is in the data file;

param Pm_min := 1 0.2 2 0.3 3 0.5;

-- 

Best Regards 

M. Umar Khan

--
You received this message because you are subscribed to a topic in the Google Groups "AMPL Modeling Language" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/ampl/2q788HRhWdM/unsubscribe.
To unsubscribe from this group and all its topics, send an email to ampl+unsubscribe@googlegroups.com.
To post to this group, send email to am...@googlegroups.com.
Visit this group at https://groups.google.com/group/ampl.
For more options, visit https://groups.google.com/d/optout.

[Robert Fourer]

You cannot define m as a param ("param m") and then also as an index ("m in M"). If you want m to be a param of your model, then you will have to use a different name for the index -- for example "i in M".

Bob Fourer
am...@googlegroups.com

=======

[khan]

Thank you very much Bob. issue resolved. :)