dear all,
i have a problem with aspen plus.. now, i try to simulate a reactive distillation column with an external decanter for butyl acrylate system..i set the organic phase from decanter to return to first stage of the column, while the aqueous phase is go out of system..
when i run the system, aspen plus always get an internal error and purge all results..so i tried to fix the specification of organic phase stream.. now no internal error occur but there is still some problem about no phase splitting occur and decanter is not in mass balance..

well, could someone give me a hint about what should i do??

thanks