Excel functions are not working e.g.: IF, ISERROR, INDEX, SMALL

Hi,

I'm using excel functions like ISERROR, IF,SMALL and INDEX. These functions are working perfectly in excel but when i use the same dashboard it says " Unsupported excel format.

And I see in the SAP Blog that they support above excel functions.

Please suggest the solution and help me out get of this.

Thanks in Advance!

Kiran