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ORA-07221:

slspool: exec error, unable to start spooler program.
Cause: Exec failed when starting line printer spooler command. Likely that either the default line printer command, or ORACLE_LPPROG, is incorrectly set.
Action: Verify default line printer command and ORACLE_LPPROG are set correctly. Set ORACLE_LPPROG to working line printer spooler.