How-to get path to a node in SPRO

Hello guys,
I'm working on a tool which creates automatic dcumentation tool of changes in SPRO. All goes fine except one thing:
I need to generate a PATH to IMG ACTIVITY. I know the code of activity, I know it's HIER_GUID. What I need to get is all "parents" HIER_GUID of bottom node.
So far I got only one FM - STREE_GET_PATH_TO_NODE. It's fine but it returns only the path to 03 level in SPRO. (01 - is top, 02 - are components).
What I desperatly need is how to get a connection from 03 to 02 level.
You can simulate the FM with following values:
SEARCH_FOR_NODE-NODE_ID = 1C1B49FEC279D411AB74009027B70B8E
SEARCH_FOR_NODE-TREE_ID = 367A8DF9ACEE16E7E10000009B38F976
The result contain the highest node id 367A8DAFACEE16E7E10000009B38F976, which stands for "SAP Business Parnter" (according the table TNODEIMGT-NODE_ID).
But the fact, that "SAP Business Partner" is in "Cross-Application Components" is unreachable for me.
Do you know, how to get relevant node on level 02 ?
All hints will be rewarded.
Thank you
Regards
Tomas

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