Hello, why does ipopt's linear solver fail to set other options

“HSL routine ma97_default_control not found in libhsl.dll” suggests that Ipopt is trying to invoke a routine named ma97_default_control, but that there is no routine named ma97_default_control in the version of the libhsl.dll library that you have.

Since this is an Ipopt solver issue, I suggest that you post this question on the Ipopt discussions page.