Change Type NODEID in BW to Type of NODEID in Source

Hi Experts,

I want to use the hierarchy framework of BW 7.3 in order to transfer a hierarchy from source system via DSO into the hierarchy of an infoobject.

Everything works so far using an expert routine. However, I have a problem with the Node IDs: in my source system node ids are of type CHAR 32 while in the standard hierarchy of BW 7.3 the node id is of type NUMC 8. This then leads to errors when tranferring the hierarchy from DSO to infoobject.

As I dont want to change the node ids of the hierarchy coming from source into NUMC 8 format, I am seeking for a way to change the data type of node ids in BW from NUMC 8 to CHAR 32.

Do you have any idea how to change the data type of node id (data element RSHIENODID) in BW?

Thanks

Tobias