I agree with what some are saying about the errors being with the locomotives or wagons and not the session or route. However, the assets in question are specific to the Murchison sessions, eg VR ELX Gondola Empty,<kuid2:1854:6057:2>; CP7109 SW4,<kuid2:38304:7109:1>; CP7110 SW4,<kuid2:38304:7110:1>; D&C Speeder #10,<kuid2:86661:10:1> and they are all built-in items and are protected from editing and cloning. These when placed in a session only show up as two close consist direction arrows hovering over nothing, once place they cannot be deleted without adding another vehicle to make a new consist and deleting the consist. The Speeder has an update on the dls which works BUT has the same version number as the one built-in to the Murchison sessions and therefore cannot be used to update Trainz for people with the Murchson DLC.
Added to these there are some wagons that are missing there bogies, eg VR J Cement wagon,<kuid2:193148:1157:1>; VR GY wagon red loaded NP,<kuid2:193148:1445:1>; VR GY wagon red empty NP,<kuid2:193148:1444:1>; VR GY wagon red covered NP,<kuid2:193148:1443:1>; VR FJ Flour wagon,<kuid2:193148:1156:1>; VR ELX Gondola Empty,<kuid2:1854:6057:2>.
These are the ones that I have come across so far and I am sure there are many more.
It has been suggested that because these are all older content that use pm files instead of im files to load texture files, that because of the protection given to them, Trainz is unable to read the files so rendering them useless.
As a test I have installed earlier versions of the above assets and increased the version numbers to one greater than that in the Murchison sessions and they now work and show correctly so there maybe some truth in the suggestion.
These cabooses also do not show:
CP439552 Caboose,<kuid2:38304:19001:1>
CP 437083 Caboose,<kuid2:38304:19005:1>
CP 437051 Caboose,<kuid2:38304:19004:1>
Caboose-Center Cupola-Southern Pacific,<kuid2:72938:100848:1>
Caboose DMIR C188,<kuid2:63971:100517:1>
caboose,<kuid:44700:15018>