Set the correct group and permission for oradism.
For example, set the permissions for ORADISM as follows:
chown root $ORACLE_HOME/bin/oradism
chmod 4750 $ORACLE_HOME/bin/oradism
ls -l $ORACLE_HOME/bin/oradism
-rwsr-x— 1 root dba $ORACLE_HOME/bin/oradism* —> where dba is the group for the Oracle OS user
Bounce the database