dbms_scheduler not working with external executable

Hi, 

Rdbms: 12.1.0.1

OS:     Windows 2008R2

Issue:

I have recently upgraded my database to 12.1.0.1 from 11.2.0.3 and one of the dbms_scheduler jobs using external executable batch file is not working and throwing the error.

ORA-27369: job of type EXECUTABLE failed with exit code: Incorrect function.

STANDARD_ERROR="The system cannot find the path specified."

There is no issue with path or batch file. Same dbms_scheduler job with same external executable works without any issue on 11.2.0.3

All other dbms-scheduler jobs which are not using external execuatbles are functioning as expected.

Note: I am planning to raise an SR but wanted to check first here at community level.