Having created a new pax file, NX reads the pax file but reports: "Cannot find the template specialization with the given name."
In this case the default item type had been set in Teamcenter and the value entered in the pax file for <ItemType> did not conform.
Select "File --> Help --> Log File" and once the Information Window displays select "Edit --> Find" and enter "TC_default_part_type". This will return the Item Type defined in NX for the default part type in NX.
Edit the pax file that had just been created/modified and enter that value that was set for TC_default_part_type between the <ItemType> tags.
Restart NX and the error should no longer be raised.
Notes and References
OS Version: 764SP1