Hi, i found something strange in my MILP model.
I read my input from an excel file to fill my parameter.
The input looks like this:
![](https://uploads-eu-west-1.insided.com/aimms-en/attachment/81b773c7-75ab-4e73-aabd-bf8036639c85.png)
I retrieve this from Excel by the following lines:
![](https://uploads-eu-west-1.insided.com/aimms-en/attachment/f1c73d0a-40f8-4510-84e6-2f701e50f368.png)
And eventually in AIMMS it looks like this:
![](https://uploads-eu-west-1.insided.com/aimms-en/attachment/0b5f6a05-708b-421d-b4e9-173d6967c3d0.png)
What is so special about this column 7 and 8 that they are moved to the left?
What can cause the order of the column to be changed without me noticing?
Note: Also in my set DiscountLevel, the order is changed:
![](https://uploads-eu-west-1.insided.com/aimms-en/attachment/5212f86a-ef54-4d6e-a7ac-91c4802a9ee7.png)
Best answer by gdiepen
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