Error while declaring the calculated column as "Measure" in Analytic View

Hello Gurus,

I was creating an analytic view which had a measure named "SALES_AMT", I created an input parameter named "IM_DISCOUNT" and then created a calculated column named "DISCOUNTED_SALES_AMT". But when i choose this calculated column as "Measure". I get the error during activation, "Repository: Encountered an error in repository runtime extension;Model inconsistency. Measure DISCOUNTED_SALES_AMT as base for input parameter IM_DISCOUNT is not allowed". If I declare this column as an attribute, it gets activated. Can you guys please check and let me know what is the issue here.

Thanks for your help!!

Warm Regards,

Raveesh