Map Book script from ESRI exercise fails with Runtime error

Discussion created by williamlord on Mar 12, 2011
Latest reply on Nov 21, 2011 by jbarrette-esristaff
I am working on the exercise " Creating a Map Book" from ESRI's online Help for v10. This is the link to the section that uses a python script.


The script returns this error.
Runtime error <type 'exceptions.AttributeError'>: Invalid path

Anyone know why? 
I was able to export the map to PDF in the prior step.