Customer found an issue where two different error messages would be shown for basically the same issue depending on the method of job configuration.
When setting the LOGIN object via 'PUT_ATT LOGIN =' the following error is shown:
U00020590 Host 'LINUX01' was not found in Login object
in case of setting the LOGIN object on the Attributes tab, the following, different, but actually more meaningful error message is shown:
U00011167 Could not find Login object 'LOGIN.NEW.132639968' for Job 'JOBS.WIN.32639968.LOGIN.ON.ATTRIBUTES.TAB' (RunID '0006218492').
Release : 12.3
Component : AUTOMATION ENGINE
The issue has been fixed with Automation Engine V12.3.7 .