ContributorQuartus Project menu -> Add/Remove files from project. You may still be pointing to files that don't exist.
Super ContributorNo I meant removing the component from the Platform Designer System View tab and then adding it again from the IP catalog (the off-the-shelf, included IP in the tool which will be up-to-date for the version of Quartus you're using), not manually manipulating all the files. Doing that is a recipe for disaster. When you delete the component, choose the option that appears to delete the component's .ip file as well.
ContributorYes I removed the .ip file at the first time, but seems like it's not the issue here. There are two versions of one entity in the project directory, and only the latest version is used in the design, namely max_xcvr_emif_if_2_0. The old one is unchecked (disabled and not used) in the System View of the Platform Designer and I removed it from the system view, including the option of removing the .ip file. But the error I gave above for max_xcvr_emif_if_0 is still not gone...
