M-Aware Error When running Tabulate Intersection

I am trying to run the Tabulate Intersection tool in order to sum 'ecoregion' types by several boundary 'zones', from another feature. However, the tool errors with:

"Geometry is not m-aware".

So far I have tried:

*Running tool from both the toolbox and from modelbuilder.
*Restarting ArcMap / Restarting Computer
*Projecting both feature classes to identical projections
*De-selecting Environments option for output to have m-values (the original feature class does not have this either)
*Changing processing extent to either the feature class with the larger extent or to the Union of Inputs
*Running both feature classes from within a File GDB or both as shapefiles.
*Running multipart to single-part for the feature class.
*Correcting topology of zone input later so that there are no overlaps.

Still, Tabulate Intersection results in the same "not m-aware" error. Has anyone else run into this recently and has found a solution? Or, would be willing to try it out on your machine to see if some random configuration on my computer is creating the error? I have attached a GDB with the two feature classes and my model.

I am running 10.1, I believe SP3.

Attached Files

• Error.gdb.zip‎ (620.4 KB)