TCP/IP-connected ODBC jobs (QZDASOINIT) will run in the QUSRWRK subsystem. Verify that this subsystem is running.
The QSERVER subsystem may need to be manually started. To do this, simply issue the following command:
STRSBS QSERVER
To have the subsystem start automatically at IPL, modify the IPL Start up procedure (the default is QSYS/QSTRUP) to include the STRSBS QSERVER command.
In addition to subsystem QSERVER, subsystem QSYSWRK, and QUSRWRK must be running.