Unable to return the objective as a linear expression after reading a .mps file about python-mip HOT 7 CLOSED

it should be self.model.vars could you try to modify in your version and see if it works ?

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tentative fix on 1.3.14, could you try ?

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I can see what you did (i.e., adding the parentheses to self.num_cols on line 409). But I now get

Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/IPython/core/interactiveshell.py", line 3296, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "", line 1, in
m.objective
File "/usr/local/lib/python3.7/site-packages/mip/model.py", line 933, in objective
return self.solver.get_objective()
File "/usr/local/lib/python3.7/site-packages/mip/cbc.py", line 409, in get_objective
return xsum(obj[j]*self.vars[j] for j in range(self.num_cols())
File "/usr/local/lib/python3.7/site-packages/mip/model.py", line 1952, in xsum
for term in terms:
File "/usr/local/lib/python3.7/site-packages/mip/cbc.py", line 410, in
if abs(obj[j]) >= 1e-15)
AttributeError: 'SolverCbc' object has no attribute 'vars'

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That does the trick! Thanks!

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good. I released 1.3.15 with the fix, please check my update if it works ok.

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Yes, the update does seem to work. Really appreciate the quick fix, and the package as a whole.

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you're welcome!

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