Re: [Help-glpk] Using suffixes with subscripted parameters?

[Andrew Makhorin]

> Here is my (potentially noob) issue.  I am trying to work through examples in
> the AMPL book (steel.mod and steel.dat), but when I try to use suffixes on
> parameters I get problems.
> 
> The following line of code works (and generates the following output):
> 
> display rate['bands'];
> 
> Display statement at line 20
> rate[bands] = 200
> 
> However if I try the following, I get the following error:
> 
> display rate['bands'].val
> 
> steel.mod:20: rate cannot have a suffix
> 
> If anyone knows how to work around this, that would be great....
> 

Most likely 'rate' is a parameter while in GNU MathProg only variables
and constraints can have suffixes.

For more details about the syntax please see the language reference
included in the distribution (doc/gmpl.pdf).