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Don Burleson Blog 







Oracle Windows listener error: System error 3 has occurred 

Oracle Database Tips by Donald BurlesonJuly 25, 2015

After running with no problems oracle 10.2.0 on Windows XP SP3 for about a month without any problem, I'm now getting this error when I try to start TNS listener:

> lsnrctl start

OracleOraDb10g_home1TNSListener System error 3 has occurred. The system cannot find the path specified

Symptom: TNS Listener service does not start giving error 3. Looking at TNSListener service properties, the executable path field is empty.

Cause: In my case the problem was generated by one of those (in)famous registry cleaners who removed some Oracle entries.

Solution: Insert the proper executable path

This should be done through regedit, it's very easy:

in My Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\OracleOraDb10g_home1TNSListener add a string key ImagePath with value %ORACLE_HOME\BIN\TNSLSNR (or wherever TNSLSNR.exe resides).



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