CASCF0017S config-module: Can not find region configuration (region-name) save file

The region configuration save file ($REGIONBASE/$TXREGN/rcf.bin) could not be located.
Restriction: This topic applies only when the Enterprise Server feature is enabled.
System Action:
Terminate the requesting process.
Resolution:
Make sure that $TXDIR is set correctly and a multi-tasking region is running.
Module:
config-module(dfhcpcfe)
Destination:
Standard error