Message Serialization failed when running groupbasedpolicy POC

We get the following exception when running the POC in groupbasedpolicy:

http://pastebin.com/Mkag1pRn

We see all the flows we expect in table 0, but tables 1, 2, and 3 only have their table-miss flow installed. A dump of the flow-mods is shown here:

http://pastebin.com/Mkag1pRn

The config data store has all the flows, but the operational data store is a reflection of what the vSwitch reports (i.e. config and oper data stores differ, but oper matches what ovs-ofctl shows on the vSwitch).