XProc error messages driving me crazy!

Using Oxygen 12 with bundled Calabash (0.9.23 I believe?) on Mac OS X 10.6 (Snow Leopard).

I just got the following error message:

SystemID: /Users/amrogers/Developer/Projects/oXygen_workspace/edu.umd/terpconnect/model/documents/201008/INFM298I/Final Project/xproc.xpl
Engine name: Calabash XProc
Severity: error
Description: XD0045 : XProc error err:XD0045 Invalid QName {}

I have been trying to pinpoint what is causing this since late yesterday afternoon, and I am nearly pulling my hair out of frustration because I have no idea what this message is referring to.

WHICH name is invalid?  
In WHICH STEP did it occur?  
WHAT LINE is mucking up my pipeline?  

Aaaaarrrrggghhhh!

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Sorry, I just needed to get that out.  Seriously, I love Calabash.  It’s opened amazing new doors for me.  I’m just frustrated as hell at the moment and I needed to vent.  :)



—Tony