CASXO0001S XA Resource Manager initialization error. Resource XAT resource name open failed, reason return-code

The Resource manager for the XAT resource returned a non-zero value to the xa_open call.
Restriction: This topic applies only when the Enterprise Server feature is enabled.

The return codes are:

System Action:
The XA resource entry has been disabled.
Resolution:
Check that the Database Manager has been started, if necessary.
Module:
dfhexa
Destination:
Console and standard error.