Solved! Go to Solution.
There is a bug that is fixed at 10.2-
NIM076948- The arcpy.da.SearchCursor() where clause does not work with a table view.
The field names will change when you use the 'AddJoin' tool, and this is most likely the issue. The new field name will be <feature class/table name>.<field name>.
There is a bug that is fixed at 10.2-
NIM076948- The arcpy.da.SearchCursor() where clause does not work with a table view.