ANR8419E DEFINE PATH: The drive or element conflicts with an existing drive in library IBMLIB.

[sersoy]

I am getting this error while adding tape paths what can be the problem

 

[RecoveryOne]

Lots of things could be the issue. Need a bit more info.
Is this a new library?
Or are you adding new drives to an existing library?

Anyhow, take a look at this:
https://www.ibm.com/support/pages/node/388669