Sonic: getMessagePartById

So I'm currently in the middle of learning SonicMQ and I have pretty good results.

Now I am beginning to use mulitpartMessages. But I have a problem consuming the messages using getMessagePartById.

My code looks like this:

RUN createTempTableMessage IN xghSonicSession (OUTPUT hPublishedTempTable).

RUN setTempTable IN hPublishedTempTable (hTempTable, ?, TRUE).

RUN addMessagePart IN hMultipartMessage(hPublishedTempTable, "myMessageID").

RUN PUBLISH IN xghSonicSession ("mySubscription", hMultipartMessage, ?, ?, ?).

on the other side I do:

DYNAMIC-FUNCTION("getMessagePartByID" IN iphMessage, "myMessageID", OUTPUT hMessagePart).

but I get

Could not find message part with content-id of myContentID.

using

DYNAMIC-FUNCTION("getMessagePartByIndex" IN iphMessage, 1, OUTPUT hMessagePart).

works perfect but I need the byID-function...

so any suggestions?

thanks,

Harry