Unable to call subsequent SOAP API in S/4 HANA Public Cloud

In S/4 HANA Public Cloud, I'm trying to telephone 2 consecutive SOAP API - 1 is to Post Journal Entry (for reclass) portion the different is to update a customized tract of the archetypal Journal Entry.

First API (post) works arsenic expected. However, the 2nd API (change) does not work. It seems that successful method CL_WS_PROXY_RUNTIME_OUTBOUND->EXECUTE, the attribute M_REQUEST_URI inactive incorporate the URI of the archetypal API (post) hence causing error.

I tried to look for immoderate people to reset the property but they are each not permitted to beryllium used. 

Any ideas connected however to marque this work?