CBC ERROR: CoinLpIO::readLp on input that Gurobi solves sucessfully

[siddharth-krishna]

The following model is solved successfully by Gurobi in ~15min but CBC returns an error:

https://storage.googleapis.com/solver-benchmarks/genx-elec_trex_uc-15-24h.lp

Output logs: (truncated)

Welcome to the CBC MILP Solver 
Version: 2.10.12 
Build Date: Mar  5 2025 

command line - cbc -printingOptions all -import /solver-benchmark/runner/benchmarks/genx-elec_trex_uc-15-24h.lp -randomCbcSeed 1 -ratioGap 0.0001 -solve -solu /solver-benchmark/runner/solutions/genx-elec_trex_uc-15-24h-cbc-2.10.12.sol (default strategy 1)
Option for printingOptions changed from normal to all
### CoinLpIO::readLp(): Variable x1048651 does not appear in objective function or constraints
### CoinLpIO::readLp(): Variable x1048652 does not appear in objective function or constraints
...
### CoinLpIO::readLp(): Variable x2115689 does not appear in objective function or constraints
### CoinLpIO::readLp(): Variable x2115690 does not appear in objective function or constraints
### CoinLpIO::readLp(): Variable -infinity does not appear in objective function or constraints
ERROR: CoinLpIO::readLp, ### ERROR: Bounds; expect a number, get: x2507697

There were -1 errors on input
randomCbcSeed was changed from -1 to 1
ratioGap was changed from 0 to 0.0001
** Current model not valid
** Current model not valid
No match for /solver-benchmark/runner/solutions/genx-elec_trex_uc-15-24h-cbc-2.10.12.sol - ? for list of commands

Is it perhaps related to #716? Thank you.

[jjhforrest]

Hopefully fixed (in master). Code allowed inf but not infinity and especially not -infinity. Also did not like objective offset as first entry (does allow as last).

Very slow reading .lp file - but I am not fixing that. If I read it in and export to mps format an read that - reading mps equivalent is ten times faster.

Clp took over an hour on my laptop to solve lp - however another open source code is still going after nearly two days!