Issue in IP - Entering value for Characteristic object

Hi Expert,

I have a requirement where the input has to be unabled for characteristic objects through IP template.

I did the development as per the blog:

http://scn.sap.com/blogs/Christopher.sapbw/2012/12/25/master-data-planning-with-sap-integrated-planning-sap-ip

The issue is the development should have been done by using Super class CL_RSMD_RS_BW_SPEC. But could not use it as super class as i could not modify the methods in this case. Instead i made a copy of this class and did some modifications to the class. The class is not working for me. Its throwing the following error.

Please let me know if you have come across similar issue, and how to resolve it.

Thanks,

Anupama