dat file empty 2d set error #258
Description
empty2d.zip
The attached files have an example of an AMPL-format dat file with an empty 2 dimensional set that results in an error. A potential fix that seems like it might work is as follows: in PyomoModel.py in _tupelize add
if len(list(data.keys())) == 1 and list(data.keys())[0] is None and len(data[None]) == 0:
return None
right before
ans = {}
but there is probably something better.
To see the error, use something like:
pyomo solve 2dDAT.py empty2d.dat --solver=cplex