From the optimizer user guide v01, for variable section, it states the min/max configuration are optional (as below and see the attached full document). So the optimizer has been configured without min/max.
However, it flows an error when execute.
Then, I configured the Min as zero and it executes successfully. If the variable can be negative value, how should I configure it to get it run?
Could anyone help to confirm the min/max configuration is optional or not? If we don't know the range of the variables, any default setting we can use?
I suspect the problem might be something else. Maybe it's how you configured other constraints. I tried to replicate the issue, but for me, the optimizer runs fine without min/max variables defined. So yes, they are optional.
If the optimizer failed due to unbound issue, the below error will prompt. I don't think my issue is due to unbound.
I have built a simple optimization model for checkng. It is verified that the min/max setting can be empty and the optimised value of variable can be negative. The issue that happen on my optimization exercise model should be some other reasons. I will continue my investigation. Thank you for all your reply.