DBMaint contains the command below:
cmplapp.sh -runquery $AUTOSYS/config/cmplapp/batch.properties -dbconparam $AUTOSYS/config/cmplapp/connection.properties -outfmt $AUTOSYS/config/cmplapp/output.properties
It gets the error below:
CAUAJM_I_85000 Compliance Application running
CAUAJM_E_85100 Unable to open database connection.
* IO Error: could not resolve the connect identifier "<identifier>"
CAUAJM_E_85002 Compliance Application terminated with error 
Release : 11.3.6
Component : CA Workload Automation AE (AutoSys)
DBMaint uses jdbc to connect to the Oracle DB.
The AutoSys Scheduler and AutoSys Application Server use the Oracle client to connect to the Oracle DB.
Please see the following tech doc on troubleshooting DBMaint DB connection errors: