Can we generate the BOM as per Solidworks model tree for WTpart

It's currently set to No. That's clearly the problem, thanks. Now we need to experiment with this a bit because there is quite a history of people having [...] with part association and suggesting ideas in this Community.

https://community.ptc.com/t5/Windchill/Auto-associate-Parts-to-CAD-Documents-checkbox/td-p/275689

https://community.ptc.com/t5/Windchill/RE-auto-associate/td-p/830103

https://community.ptc.com/t5/Windchill/Auto-Associate-EPMdocument-to-WTpart/td-p/119852

https://community.ptc.com/t5/Windchill/Associate-wtpart/td-p/295193

https://community.ptc.com/t5/Windchill-Ideas/Add-Preference-to-Enable-Customers-to-Configure-Available-WTPART/idi-p/727662

https://community.ptc.com/t5/Windchill-Ideas/Pref-Create-Content-links-for-drawings-upon-checkin-should-work/idi-p/469486

https://community.ptc.com/t5/Windchill/What-is-this-object-type/td-p/192872

https://support.ptc.com/help/windchill/r12.1.2.0/es/index.html#page/Windchill_Help_Center/ProEWCInteg/ProEWCIntegCustOperationPref.html