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I'm puzzled by inconsistent behavior between the CBC and HiGHS solvers.
Given the attached model, CBC returns the correct optimal solution of 15, while HiGHS fails with an error: "ValueError: Error…
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We've seen occasional issues with unit models using the DSPM-DE model (see #860, https://github.com/watertap-org/watertap/actions/runs/3650225701/jobs/6165944727#step:11:5728, https://github.com/water…
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When running minpower in debug mode I get the following warning messages:
pyomo.lp:79690: warning: lower bound of variable `status_Bridger1(t648)' redefined
pyomo.lp:79690: warning: upper bound of va…
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### Checklist
- [X] I am using the current [`master`](https://github.com/PyPSA/pypsa-usa/tree/master) branch
- [X] I am running on an up-to-date [`pypsa-usa` environment](https://github.com/PyPSA/…
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## Summary
This issue emerged as part of the IDAES release earlier today (a test in IDAES uses an import path that has been deprecated in pyomo 6.4.3, which is used below to reproduce the error), but…
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## Summary
- IDAES recently (IDAES/idaes-pse@bf61436) introduced a new implementation for Helmholtz EOS
- As a consequence of that change (as shown by `git bisect` on the IDAES/idaes-pse repositor…
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For solving large long-term models (European scope, 2020-2025/2050, hourly resolution, including demand response), currently `Out of Memory Error`s are faced.
These are twofold:
**Problem 1** (f…
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### Checklist
- [X] I am using the current [`master`](https://github.com/PyPSA/pypsa-usa/tree/master) branch
- [X] I am running on an up-to-date [`pypsa-usa` environment](https://github.com/PyPSA/pyp…
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`sage.numerical.backends` depends on very little from Sage. We propose to split out the optional backends (COIN, CPLEX, Gurobi) to separate Cython packages.
With this ticket, sagelib no longer has…
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### Description
The `dbpath` parameter for the `Database` class is supposed to let the user define the path to a YAML file. But this path is ignored and watertap uses the database YAML files provided…