Hi Abhishek,
When you say
When I am trying to remove the printing parameter from any job definition in Redwood CPS, it won't work and not allowing to save this changes in CPS.
I assume, you edited the job definition, but the job continues to print.
This is because, when you edit the job definition, the already existing schedule will not be affected and continue to run with old values. This schedule must be cancelled/killed.
So before you edit the job definition, right click and select related jobs from context menu and if you see the job in scheduled status, stop the job schedule (cancel/kill) for entire job group.
Now edit the job definition(remove print parameters) and schedule it again.
You can use the promotion module to mass edit the printer parameter in all jobs you imported from SAP by utlizing Import rule sets. How ever you have to stop/cancel the existing job schedules.
Thanks
Nanda