ERROR: ORA-12560: TNS:protocol adapter error: No listener.

Problem: You are trying to access oracle database using sqlplus, or using forms builder, or using oracle reports builder and Toad. ERROR: ORA-12560: TNS:protocol adapter error: No listener. Solution: check the status of the Database listener by Running the Command Prompt with this code : lsnrctl status if the command completed unsuccessfully start the Listener […]
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