As you may know, there is a tool called LND (Lotus Notes Diagnostics) to process NSD files for Domino up to v9.0.1:
Unfortunately, last version was released 10 (!!!) years ago , contains obsolete recommendations and does not support Domino v10 or v11 NSD files.
Of course, there is a workaround - how to get it working - you need to manually change Domino version in NSD from 11 or 10 to 9.0.1.
Please provide admins a new tool to analyze NSD files. This will reduce HCL Support load and help admins to solve problems on their own.