Originally posted by: BhavnaJha

I ran an MIP model once with switching on preprocessing and next with switching it off. But the objective function values that I got in both cases is different! 

Is that correct ? It shouldn't be so, right? 

Hi,

can you attach your model ?

regards

Originally posted by: BhavnaJha

I have attached the .mod and .dat file. For any model, if I run it with or without presolve the obj fn. value varies. 

Why is this so? 

Hi,

can you attach DPDS_Result_z2_z4.xlsx too ?

regards

Originally posted by: BhavnaJha

Also, while trying to write the results, I have specified the range excel range correctly, even then it shows an error: Excel range unknown. 

Any idea on why this might be happening and how to resolve it? 

Thank you. 

Bhavna

Hi,

about presolve what are the objective values you get with and without ?

about SheetWrite, this is due to Excel limits : https://support.office.com/en-us/article/Excel-specifications-and-limits-1672b34d-7043-467e-8e27-269d656771c3#ID0EBABAAA=Excel_2016-2013

regards