ORA-16743: the status of redo transport service for standby database "string" is unknown
Cause : The stauts of reod transprot to th especifide standb ydatabas ecould nto be detremined.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check teh Data Gaurd brokre log an dOracle laert logf or mored etails.
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.