Crosstab Selection is not working or empty using getSelectedMember

Hi,

I am facing a problem in crosstab selection, Actually I want to get Selected item from CROSSTAB_1 and want to filter some data source which is used in CROSSTAB_2 and more, here the panic thing is for some selection its working and for some its not, I checked and tried to debug it in local mode but no luck, can't reached to any valuable answer. I found some SCN doc's which has not helped me.

My back end is SAP HANA, consuming calculations view in Design Studio 1,5.

Please find screenshot below for the same. And I want to highlight also the cell should be clicked  for selection for user convince, for this i used DataCell selection type and highlighted DataCell using custom CSS, also checked Single and Rows type selection.

Clicked on second row data but selection is empty

using getSelectedMember for example,

DS_3.setFilterExt("USERID", me.getSelectedMember("USERID"));

Now i clicked on last row data, now got selected member.

Please note its happing most of the time (more then 85% time), some time getting actual selection what is desired.

Thanks

S Kumar