Starting process chains using RSPC_API_CHAIN_START(parallel execution of processes)

Hi,

We've got sap bw 3.5 installed.

We are using API RSPC_API_CHAIN_START to start executing process chains.

IF we are using param I_SYNCHRONOUS = 'X'  then if we have parallel processes in chains they are executing one by one.

IF we are setting param I_SYNCHRONOUS = ''   then proccesses are executed in parallel. But I recieved all the prompts. For example for chosing background server.

and others.

Is there an opportunity to combine these 2 cases: not to have prompts and execute processes in parallel?

Thanks for you help

Andrey