HCL is offering a very great summary about how to gather data for troubleshooting different issues for various solutions:

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0128252

There´s a guide for different issues with HCL Domino, HCL Notes, HCL Verse, HCL Traveler and also HCL Nomad.