Symptoms

When using a form rule with mapping referencing subform defined in a state, the K2 package will fail to create with Null Reference Exception error, this is occurred after the 4.7 upgrade.

From the hostserver log file, the actual error message is
"Error 30003 Object reference not set to an instance of an object"
 

Diagnoses

This is a known issue.
 

Resolution

Please log a support ticket to obtain the hot fix.