Can I suggest...
(A) You post your flow by exporting it (not a screenshot) so people can see what is inside your function nodes and help you get it working. Here's a link that explains how to export a flow to the forum.
(B) Put a debug node on the output of S7 nodes and show a typical output.
I'm still not sure what you are trying to achieve with the two S7 nodes.
Are they working independently of each other?
Or do they rely on the two inputs?
You have two "flows" which seems to indicate the two S7 nodes are NOT related.
