How do I fix ORA 12541 error?

First, make sure that the listener is up and running. To do this, go to the Control Panel into Services under NT or listener control program (LSNRCTL). If the listener is up and running, the problem may lie with the listener not having been associated with the correct instance or protocol.

How do I fix no listener error?

First check the tnsnames. ora file and ensure that it points to the correct server and port. If the Forms server is on another machine, test the TNS resolve with tnsping from the command prompt. Finally, check the listener.

How do I fix ORA 12514 TNS listener does not currently know of service requested in connect descriptor?

go to Net Manager > Listener > select database services form the combox > “Global Database Name” must be same as “SID” and “Oracle Home Directory” must be correct. If you don’t have any entry for database services, create one and set correct global database , sid and oracle home.

Where can I find TNS listener?

It can be found in the “$ORACLE_HOME/network/admin” directory on the client. This file will also be present on the server if client style connections are used on the server itself. Here is an example of a “tnsnames. ora” file.

Can’t find listener Ora file?

ora file is located in the ORACLE_HOME/network/admin directory. The listener. ora file can also be stored the following locations: The directory specified by the TNS_ADMIN environment variable or registry value.

How do I check my listener Ora?

Traditionally, the listener. ora is in $ORACLE_HOME/network/admin with a soft link to the ORACLE_SID location. In windows, look for the tns_admin registry entry. If tns_admin is set then you should be able to use a network alias, not the full “(DESCRIPTION…” connect string.

What is Sqlnet Ora in database?

The sqlnet. ora file is the profile configuration file. It resides on the client machines and the database server. Profiles are stored and implemented using this file. The database server can be configured with access control parameters in the sqlnet.