Webi displays null and wrong values after BW upgraded to SP6

Hi,
Webi report retrieves blank values after BW Backend upgraded to SP6.
We were on SAP EHP 1 for SAP Net Weaver 7.0 and SP4. On the BO side we are on BO XI R/3 FP 2.1.
Once we add new filters to a simple webi query the webi displays the null values for the characteristics which already exist in the report and more ever wrong values displayed for few columns. We have checked the MDX query in BW by using 'MDXTEST' and the results are good.
It looks like that it is a rendering issue in Webi side and exactly no idea...
Can anybody know how to fix the issue or any SAP notes exists for resolving this?
Thank you,
Regards,
Satya

Hi Ingo,
We are also facing the same issue that satya is facing.
We have developed the reports in BO XI 3.1 SP2 FP2.1 and SAP BW 7.01 EHP1 which was running correctly and showing the right result.
But we upgraded the BW system to SAP BW 7.01 SP6 and check the WebI reports which was showing the unexpected results. ( instead of n rows it shows only 1 row for any query without dimension values)
So we upgraded the BO sys to BO XI 3.1 SP2 FP 2.6 and checked the result but no luck with that also.
The workaround i found is i must need to add the Node objects from the universe in the Query which are also used in the query filter of Web Intelligence. But this is not reliable as we need to change all the developed queries.
We have also tried to perform the things shown in the notes but no MDX trace is enabling.
Please let me know if there is any other solution.

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