Error message on XMI Import

[GM]

After importing an XMI from a package which I had previously exported from another project, I noticed an error message appearing twice in the import log:

Error: Unknown Transition Source or Target

The import gets completed and the package is apparently fine. I need my project to be flawless, thus I would like to know what's the origin of this error so I can work to remove it. I couldn't find any reference. Any clue?

[qwerty]

This indicates that a connector from an element inside the XMI leads to another element not present in the importing repository. Usually that happens if the XMI was exported from a package with dependencies to another non-exported package.

If those dependencies are irrelevant you can ignore the message. Else import the missing packages also. Once they are imported a re-import will pass. So if you import the missing packages they should pass without message (except they have other unresolved interdependencies).

q.