Concurrent BSSV call ends in Bad request

Hi,

We are calling differnt standard BSSVs & custom BSSVs from Integration layer ie from SOA.

Most of the interfaces are automatically called whenever input source files are reached.

In such cases we require to call  a single E1 BSSV  frequently and sometimes concurrently.

When we call the BSSV with less time difference,it is executing as expected.But JDE BSSV gets "bad request error" when concurrent BSSV calls are made.

We want to understand the root cause for the issue or behaviour of the BSSV concurrent execution.

Thanks.