Code: ORA-12154
Description:
 TNS:could not resolve the connect identifier specified
Cause:
 A connection to a database or other service was requested using a connect
identifier, and the connect identifier specified could not be resolved into a connect
descriptor using one of the naming methods configured. For example, if the type of
connect identifier used was a net service name then the net service name could not be
found in a naming method repository, or the repository could not be located or
reached.
Action:
 A connection to a database or other service was requested using a connect
identifier, and the connect identifier specified could not be resolved into a connect
descriptor using one of the naming methods configured. For example, if the type of
connect identifier used was a net service name then the net service name could not be
found in a naming method repository, or the repository could not be located or
reached.