Error 404 When Accessing /OA_HTML/AppsLogin Not Found After Upgrade To Database 12c

Posted by  Abishek Kathiresan
Applies to:
Oracle E-Business Suite Technology Stack – Version 12.1.3 and later
Information in this document applies to any platform.
Symptoms:
 Error 404, /OA_HTML/AppsLogin not found Error when accessing AppslocalLogin.jsp
Changes Made:
Database was upgraded recently to 12c.
Cause:
   File: $OA_HTML/../META-INF/application.xml is manually modified. The file contains duplicate entry for Oracle E-Business Suite Release 12.
Solution:
To resolve the issue, execute the following steps:
1. Copy $OA_HTML/../META-INF/application.xml form backup
       OR

  cp $FND_TOP/admin/template/application_xml_1013.tmp $OA_HTML/../META-INF/application.xml

2. Restart the oacore.

3. Retest the issue.
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