formula varible with replacement path not working

Hi Guys,

I have two date field in CUBE finish date and Date.

I have created the selction input for date as interval. and created two formula variable start date with from value and End date with TO value.

these are working fine. But when I created the formula variable on Finish date with replacement path with single value it is not working

no error.

Please give some idea how it can be resolved.