I have problem with selecting parts in NX. When I try to select parts in assembly by ctrl+A or lasso some parts doesn't select. The same assembly on other computer work well and I can select all parts. Anyone has some Idea what could be a reason??
Make sure that you set the 'Allow Multi-select of Hidden Bodies and Faces' toggle in your selection options. If you can't see the toggle make it visible in your selection bar:
I recently had this same issue come up & glad I found this post. My situation was a little weirder: on my selection bar, the "allow multi-select..." was not shown but appeared to be toggled-on in my menu-option pulldown. Only after I selected from the pulldown did it actually "switch on" & now everything seems normal again. So in other words, my displayed options conflicted with the actual setting (showed "on" but wasn't).
Hope this post helps someone else!