Error parsing NEOS solution file in Pyomo

Question

I wrote a very simple model in Pyomo environment and added the following two commands at the end.

solver_manager = SolverManagerFactory('neos')
results = solver_manager.solve(model, opt='cplex')

It returns the following error when I run the code:

ERROR: Error parsing NEOS solution file NEOS log: Job 10044842 dispatched password: MXusJYWF ---------- Begin Solver Output ----------- Condor submit: 'neos.submit' Condor submit: 'watchdog.submit' Job submitted to NEOS HTCondor pool.

I know that this is due to Neos's recent requirement of an email address with jobs submitted to NEOS, but how can I fix this problem?

Answer 1

Since January 8 of 2021, Neos require a valid email address for all submissions. First of all, you must sign-up in: https://neos-server.org/neos/index.html

After that, you must upgrade a file in the Pyomo directory (in my case is ../anaconda3/lib/python3.8/site-packages), later you look for this path pyomo/neos/ and you must update the file kestrel.py with this file https://github.com/Pyomo/pyomo/blob/master/pyomo/neos/kestrel.py

When you upgrade the file, put a valid e-mail in 224 line of kestrel.py file.

Answer 2

An added note to what Alvaro Avendano has said. Edit kernel.py before line 231, i.e. the line that writes email = os.environ.get('NEOS_EMAIL', '')), with the following:

 os.environ['NEOS_EMAIL'] = '<<you email address>>'