Start_processes: failed to open STDOUT (1) , catconExec: catconInit has not been run datapatch error

Hi,

We experienced issue with  datapatch run and it had failed with below error.

start_processes: failed to open STDOUT (1)
Installing patches...
catconExec: catconInit has not been run
catconWrapUp: catconInit has not been runPatch installation complete.  Total patches installed: 2

Cause
====

It happens when we have multiple database instances running on a single machine and those OS users don't have privileges on each other's files (sqlpatch files) and as a result datapatch fails while trying to open catcon log files. 

Solution
====

Delete files under: /tmp/sqlpatch_* and re-run datapatch for the affected database.

Datapatch error "CATCONINIT FAILED" when applying patch in a multi-DB environment (Doc ID 1935401.1)

Thanks.
Sreeharsha