https://communities.bentley.com/products/administration/f/product-administration-forum/127219/ms_level_do_not_synchronize_attachment_levels_to_dgnlibThere are several posts relating to this: MS_LEVEL_DO_NOT_SYNCHRONIZE_ATTACHMENT_LEVELS_TO_DGNLIB but none of the documentation links work anymore. Nor is this variable documented. Makes MicroStation issues related to this variable difficult to supporten-USTelligent Community 12https://communities.bentley.com/thread/387153?ContentTypeID=1Thu, 13 Oct 2016 16:12:22 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:6387be0d-9d00-4e2d-ac91-e9d01c939567Gary MansagerThanks. I did find it in SS4 documentation per Jan. It appears that it also functions if defined as Boolean &quot;0&quot;?<div style="clear:both;"></div>https://communities.bentley.com/thread/387149?ContentTypeID=1Thu, 13 Oct 2016 16:01:52 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ec03499b-5235-4f49-94a8-70ad045ef972Todd MoserFrom MicroStation Help<br /> MS_LEVEL_DO_NOT_SYNCHRONIZE_ATTACHMENT_LEVELS_TO_DGNLIB<br /> If set to 1, the reference attachment levels are not synchronized to the attached library.<div style="clear:both;"></div>https://communities.bentley.com/thread/387147?ContentTypeID=1Thu, 13 Oct 2016 15:57:21 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:642f72cb-6795-43c1-88cd-87e0d7f22a37Jan ŠlegrHi Gary,<br /> <br /> I see this variable described both in MicroStation V8i (SELECTseries 4) and MicroStation CONNECT Edition Update 2 in chapter &quot;Uncategorized Configuration Variables&quot;.<br /> <br /> With regards,<br /> <br /> Jan<div style="clear:both;"></div>