Hi,
You can get the debugging info. on IQ side as follows.
** Please refer to the below KBA.
2173714 - [SAP IQ] How to get the debugging information when connection and communication issues happen.
https://i7p.wdf.sap.corp/sap/support/notes/2173714
Could you try to use a Cockpit instead of SCC?
Thanks
Gi-Sung Jang