Error from Full client to WEBI?

Hi Senior members..

I stuck with a issue..

Actually i converted some deski reports 6.5 to webi XI R3 using report conversion tool..!!

But some of them are partially converted with the following error log..

a) Partially Converted: Desktop Intelligence block filter cannot be migrated into a Web Intelligence block filter

b) Partially Converted: Multiple groups not available in Web Intelligence charts

c) Partially Converted: Objects cannot be hidden in Web Intelligence documents..

Could you please help me out to get rid of this issue