What are you trying to do?
A) Exchange some data with another user - means you export an XML from FCP?
- Both versions of FCPX are the same. We have tried...
Which version of FCP?
B) Import some XML data created by an external app into FCP?
Could you upload the XML (or a similar with same behaviour) somewhere?
Looking at the error message ...
The XML document sent from application “Final Cut Pro” could not be imported.
The media file cannot be imported. An offline clip was not created because of insufficient data. (frameDuration=<empty>: /fcpxml[1]/resources[1]/format[6])
No such file or directory
... looks like there is an 'older' incompatible XML from an external app (like from Plural Eyes).
You can have a look at the XML
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!DOCTYPE fcpxml>
<fcpxml version="1.10">
<resources>
<format id="r1" name="FFVideoFormat1080p25" frameDuration="100/2500s" width="1920" height="1080"></format>
...
Search for the 6th "<format" entry, then look at the frameDuration entry - maybe it's "" or missing at all.
