I have solved and obtained the result with DP2, I still do not understand why DoE cannot do it. I can see solving for each DP manually. Setting the related DP as current and doing the whole process one by one. This is the long way which optimization cannot be transferred to to response surface step. Hence, optimization can be done on another software with the data obtained here. Also, geometrical error that should be troubleshoot before the solution.

Thank you for all the responses. Let me know if you can come up with a solution, I will also do so.