Go to "Oracle Support" and Search bug number (20900599)
Step 2: Run "Command Prompt (cmd)" as Administrator
Step 3: Set "ORACLE_HOME" and add OPatch directory to "PATH" variable
SET ORACLE_HOME=C:\Dev\Oracle\Middleware12c (Oracle direcotry)
SET PATH=%PATH%;C:\Dev\Oracle\Middleware12c\OPatch (OPatch direcotry)
Step 4: Extract the downloaded patch and browse folder via cmd
Step 5: Run "opatch apply" Read the complete article here.
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