Formula EPMContextMember Filter with symbol >

Hi

I try to filter a properties of ENTITY with symbol ">"

I have a formula in my Excel report =EPMContextMember("MODEL";"ENTITY";"DATA > 20150101")

DATA is a property with 8 digits of ENTITY.

I select in  TIME dimension 2015.01   -> Transform 2015.01 in 20150101 and cell A1=20150101

I have tried the formula

1 .- =EPMContextMember("MODEL";"ENTITY";"DATA>"&A1)  ->error message

2 .- =EPMContextMember("MODEL";"ENTITY";"DATA>&A1")  ->error message

3 .- =EPMContextMember("MODEL";"ENTITY";"DATA > 20150101") -> error message

if I do this 1,2 0r 3,....=EPMContextMember(...), I received error message EPM EMSSAGE Format of the user defined filter ... is invalid

Is there any way to filter with the symbol ">" ?

Regards