Problem with JuMP.fix command

[trivedymk]

Hi,

I've been working on a complementarity model and it involves fixing some variables. To do this in JuMP i've attempted to use

for i in suppliers, s in seasons, t in timeperiods JuMP.fix(s_contract["EU","UK",i,s,t],0) JuMP.fix(s_spot["EU","UK",i,s,t],0) end

However, when I run this with complementarity I get the error

"setvalue for fixed variables is no longer supported. Use JuMP.fix instead.".

Complementarity.jl/src/mcp.jl

Line 145 in 9f2405d

setvalue(mcp_data[i].var, z[mcp_data[i].lin_idx])

So setvalue here needs to be changed to JuMP.fix to reflect the updated jump build I think.

[chkwon]

Thanks for the update. I'll take a look surely. By the way, i don't think I can work on it sometime soon as I am in an international travel.

[chkwon]

I don't understand what fixing a variable in a complementarity problem means. Does your complementarity problem have multiple solutions?

Does the PATH solver or other complementarity problem solvers (if any) support such variable fixing functionality?

[boxblox]

I am also getting this JuMP.fix error... I believe trivedymk might be right that setvalue has been deprecated. Any solver should be able to handle this type of fixing... an equivalent statement would be to say that JuMP.fix(x, 5) or 5 <= x <=5. In a GAMS environment you can do this with PATH.

[chkwon]

Closing for the new version of PATHSolver.jl chkwon/PATHSolver.jl#44