Hi Hari,
i guess you know transactions EMMACAP, FPEMMAMA for executing automatic processing of solutions implementtaion for created cases, the automatic execution flag must be activated under soltion tab, and the process should not have any user interaction interface.
so if you mean, the execution of the solution during the creation process of the BPEM case, you'll have a problem because, before to execute the solution, the case should exist in the database. the result of solutionexection at runtime or after creation have same result except that the execution using standard transaction above are more performant and can be execution in background/parallel processing