Hi,
I suppose you are referring to the XRef Object Merge: Units Mismatch warning window. Unfortunately, it’s not possible to bypass this dialog window – it’s triggered automatically by 3ds max when merging object(s) from a scene that’s using different scene units and as this issue isn't related to our plug-in at all (it'll happen in any scene using several XRefs that doesn't match the scene unit set-up), we can't do much more in this case. Thanks for your comprehension. If fact, we asked Autodesk about some mechanism to disable it, but I’m afraid there isn’t any at the moment available.
Best regards,