CASXO0008S Resource Manager for resource XAT resource name Has heuristically rolled back the transaction

The Resource manager for the XAT resource reported that due to a heuristic decision the work done on behalf of the transaction has been rolled back.
Restriction: This topic applies only when the Enterprise Server feature is enabled.
System Action:
The state of the transaction is undefined.
Resolution:
Contact your administrator for the resource.
Module:
dfhexa
Destination:
Terminal.