CPLEX Error 5002: objective is not convex.

[swans9]

I am unsure if this is an issue with the code or my data, since I am running this on a Windows 10 OS and have very remedial computer science skills.

I received the following error message after my multiconformer model was produced.

(I apologize for the indentation.)

Command Run: qfit_protein C2composite_omit_map.mtz -l 2FOFCWT,PH2FOFCWT C2Loops_refine_SingleOPSR2320.pdb

Traceback (most recent call last):
File "c:\anaconda\envs\qfit\lib\runpy.py", line 193, in _run_module_as_main
                             "__main__", mod_spec)
File "c:\anaconda\envs\qfit\lib\runpy.py", line 85, in _run_code
                                        exec(code, run_globals)
File "C:\Anaconda\envs\qfit\Scripts\qfit_protein.exe\__main__.py", line 7, in <module>

File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit_protein.py", line 461, in main
                  multiconformer = qfit.run()
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit_protein.py", line 193, in run
                   multiconformer = self._run_qfit_segment(structure)
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit_protein.py", line 293, in _run_qfit_segment
     multiconformer = qfit()
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit.py", line 1017, in __call__
                     for path in self.find_paths(segment):
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit.py", line 1087, in find_paths
                   loop_range=[0.34, 0.25, 0.2, 0.16, 0.14])
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\qfit.py", line 283, in _solve
                        solver(cardinality=None, threshold=threshold)
File "c:\anaconda\envs\qfit\lib\site-packages\qfit\solvers.py", line 204, in __call__
                   miqp.solve()
File "c:\anaconda\envs\qfit\lib\site-packages\cplex\__init__.py", line 1329, in solve
                   _proc.mipopt(self._env._e, self._lp)
File "c:\anaconda\envs\qfit\lib\site-packages\cplex\_internal\_procedural.py", line 692, in mipopt
      check_status(env, status)
File "c:\anaconda\envs\qfit\lib\site-packages\cplex\_internal\_procedural.py", line 236, in __call__
    raise CplexSolverError(error_string, env, status)
cplex.exceptions.errors.CplexSolverError: CPLEX Error  5002: objective is not convex.

Files Attached: C2composite_omit_map_and_PDB.zip

[blake-riley]

Thanks for the issue Chris! Could you please edit your issue, and wrap it with three backticks on the line above (```) and below? This is how GitHub marks verbatim text (and will help us read it!)

[blake-riley]

Could you please additionally:

• tell us the command that you're running?
• attach associated files to this issue (if possible)?

It looks like the CPLEX solver is suggesting that you've built an unsolvable problem. This might be something about the qfit algorithm, or it might be down to your input files.

[swans9]

I have edited the issue, and added the files and command I ran. I received a model from the qfit program, so it may just be the input files.

[dhogan-io]

Should now work due to change to CVXPY: https://github.com/ExcitedStates/qfit-3.0/pull/402

Closing, but feel free to create a new bug if the error still occurs.