dear小王子

> Hi, @GithubMingEnter. I have never see that error. Did you follow the [installation guide](https://github.com/Geonhee-LEE/mpc_ros/blob/melodic/assets/document/ipopt_install/ipopt_arm_install_tutorial.md)? Hi, I find the same error ` vector: index greater than or equal vector size...

> @DeepDuke you can give me an e-mail address so that I can give you the package. Can you send me the package too. My Email address is [email protected]. Thank...