BI_开发_问题:Message Code: RR_4036 ORA-12154: TNS

everity: ERROR
 Timestamp: 1/16/2013 11:01:37 AM
 Node: node01_enecora02.enec.gov.ae
 Thread: READER_1_1_1
 Process ID: 18126
 Message Code: RR_4036
 Message: Error connecting to database [
 Database driver error...
 Function Name : Logon
 ORA-12154: TNS:could not resolve the connect identifier specified

 Database driver error...
 Function Name : Connect
 Database Error: Failed to connect to database using user [xxapps] and connection string [source_conn].].

 source_conn is ODBC of source instance. 

错误原因,看看informatica server上面DB的tns.ora里面有没有相应的sid