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odow / SDDP.jl

Stochastic Dual Dynamic Programming in Julia

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Running into some error (MSPFormat reader)

bonnkleiford opened this issue · comments

commented

Hi Oscar,

I was trying the MSPFormat reader function to try energy problem. Unfortunately, I ran into some error where one of the coefficients (price_6) of the objective function is not found. Here is the full error:

Screenshot 2023-07-06 at 21 25 55

Here are the two JSON files (problem and lattice) for reproduction purposes:
Energy.zip

Best,
BIKEY

commented

That's this line:

SDDP.jl/src/MSPFormat.jl

Line 38 in e2e1ecb

_get_constant(terms::String, state::Dict) = state[terms]

I think we discussed this, but I don't remember the conclusion. If a node i the lattice was missing a random variable, should we infer the value to be 0.0?

I'll re-iterate that I think this is a bad idea and a recipe for bugs. There's no need for file formats to be clever or save space. The zip file with and without the default values should be pretty similar.