#DATA Sync & # CONTEXT error in BI 4.1 with ECC 6 environment

I am getting the #DATA Sync & # CONTEXT error in BI 4.1 with ECC 6 environment. When i am adding Excel Sheet as asecondary source for BO report am getting this error. because of below,

Ecc data

Profit center -- 000100

Fiscal Year --- 2,014

Posting Period - 1  to12

Amount 2000

Excel Data

Profit center -- 000100

Discharge Date --- Q1 2014, Q2 2014,

Discharge Port --- Excelerate or Expediate, etc

I ahve created report Using ECC Data like, Profit center,Fiscal Year,Posting Period and Amount.

Now i want to Add from Excel Discharge Date and Discharge Port am getting the #DATA Sync & # CONTEXT error or Imcompatible object.

because i am anot able to merge these objects with ECC Objects. Can anyone suggest me what i can do to achieve this?

Cheers

Murali Durairaj