Quicksum is giving keyerror: '540187', and sum is giving fatal windows error

Answered

D

• March 26, 2023 20:34

So I am receiving this error regarding quicksum, but it is vague. My code is a bit old, I am not sure if it's a new version issue. Here is the line of my code where this bug occurs.

"obj = (quicksum((1-F[i,j,k])*G[w]*M[w] for k in K for j in J for i in I)) + (quicksum(L[i] for i in I))" 

The error is:

File "gurobi.pxi", line 3254, in gurobipy.quicksum

  File "...." line 108, in <genexpr>
    obj = ....

KeyError: '540187'

Related to

• Error
• Python

0

• 

  Marika Karbstein

  Gurobi Staff

  • March 27, 2023 07:11

  A KeyError is raised when a mapping (dictionary) key is not found in the set of existing keys, see Python’s documentation.
  So, you should check the definition of L, G, M.

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