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ORA-12538: TNS: no such protocol adapter error resolved

Source: Internet
Author: User
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This morning, we found that PLSQL could not be logged on. After Entering the user name and password, we will prompt: ORA-12538: TNS: no such protocol adapter

It was really strange. I thought about it yesterday. It was estimated that workflow was installed yesterday. I searched for it and thought I could not find the path, the default path usually points to the last installation path. Therefore, open PLSQL (not logged in), find tools-preferences, and select the correct path in the connection interface, you can log on again.

 

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