DIA-48448: This command does not support multiple ADR homes



This error come because ADRCI in server has multiple Oracle instances on it.

To check the error in your environment please use the below command:
adrci> show control
DIA-48448: This command does not support multiple ADR homes




To solve this issue set ADRCI home for the instance you need it.

1- adrci> show homes
ADR Homes:
diag/tnslsnr/dbserv/oracle
diag/tnslsnr/dbserv/listener
diag/clients/user_dbserv/host_3284865554_82
diag/rdbms/oracle/oracle 



2- adrci> SET HOME diag/rdbms/oracle/oracle