Login error

Hi,

I am on SAP BPC NW 7.5 version and currently using MS office 2010 excel

While I login into the P and C tab, I get the below error pop-up:

Error occured on following process: Find admin xla

Error message : Method 'Logon' of object '_CEVExcel' failed

What could be the reason for this, and how do I resolve it ?

Thanks.