[Help-glpk] GMPL fails on circular references

[Meketon, Marc]

I had a line of math-prog code that had a circular reference:

 

    param FromNode{ (train,sd,seq) in TRAIN_SEGS } symbolic := Terminal[FromNode[train,sd,seq]];

 

 

GMPL, much further down in the model, just stops without any warning or anything else.  It took a while to figure out the circular reference and fix my error.  If possible, it would be nice if GMPL could discover this and issue a message.

 

-Marc