lead selection not set after sort in alv

Hi,

We have recently upgraded to SAP NetWeaver BI 7.0 .....after this i am facing a problem onlead selection dump when we apply sort....

I have a parent child relation in my context node with cardinality for parent node(0.n) and child(1.1) ....

even though i set the lead select for the parent node which is binded to ALV in wddomodify method ....i am facing the dump

Adapter error in &VIEW_ELEMENT_TYPE& "BTN_CHNG_DISP" of view "/SAPCDPT2/PROJECTTRACKER.VIEW_PORTFOLIO": Context binding of property TEXT cannot be resolved: Lead selection not set for context node VIEW_PORTFOLIO.1.PORTFOLIO

Thanks,

Shailaja Ainala.