I suspect that you're not really aware of what this option was designed to do.
When you 'lock' a row of a Parts List note, what this means is that if you delete the component for which this row was assigned that the row will NOT automatically be removed from the Parts List note but rather the 'row' will update based on the 'Deletion' rule as specified in the Parts List Style dialog. When 'locked', there are four options as to how to handle the contents of a row when its corresponding Component is deleted; 'Strike Thru' (
self explanatory), 'Blanked' (the cells remain but their content are removed), 'Hidden' (the enter row is removed) and 'Ordinary' (nothing happens).
Now I'll admit that the 'bubble-help' that is displayed when you hover over the 'Lock/Unlock Rows' option in the MB3 pop-up menu, is poorly worded. After seeing this thread and after checking the help files I opened a PR requesting that the wording of the 'bubble-help' be revised to more accurately reflect what this function was designed to do.
For more information, please go to the NX Help file and search on 'lock row parts list' and you'll find a very detailed explanation of the 'Lock/Unlock Rows' feature.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
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