How to set BI-IP / BEX variables dynamically

Hi Experts

I have to call my BI-IP planning sequence  from ABAP program, I will use for this purpose standard program  RSPLS_PLSEQ_EXECUTE.  The only problem is that I have to pass every time new values to selection variables of this planning sequence.

So is it possible in BI-IP to set variable's values dynamically ?

Is there any function module or class method to set variable values dynamically ?

In BPS there was function module API_SEMBPS_VARIABLE_SET and class cl_variable and it was possible set variable values dynamically, but both solutions used planning area as one of the input parameter which in BI-IP is not used any more

Thanks for any help

Bartek