ORA-16620: one or more databases could not be contacted for a delete operation
Cause : The Data Guard broker could not reach one or more standby databases for either a delete database operation or a delete broker configuration operation.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
This typically indicates a network problem where the standby database is unable to respond to the primary database. In the event of this situation, examine the primary database's Data Guard broker log for to determine which standby databases could not be reached. Then for each standby database not reached, connect to that database and shut down the broker by setting the initialization parameter, dg_broker_start, to false. After the broker has been shut down for the standby database, locate the Data Guard broker configuration files from the standby database's dg_broker_config_file[1|2] parameter values and delete them.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.