even worse is that you do not know what is causing it still. first you said it was all JR rolling stock, then that it was a 4 bay hopper, then the 60 ft boxcar, then the autoracks. it is very difficult to determine anything this way and i still do not think you have found any answers. i still think your install is somehow messed up and the game should be re-installed. if you have tried doing a complete database repair and the script cache update and as well have no assets with any errors or missing items and you still have these problems i can only come to the conclusion the install is corrupted somehow. so far no good reason has been presented as to why you think only JR items are at fault and are causing so many problems, from disappearing trains to making rrmods cars unable to load.
I'm a bit disappointed in your response to this Justin. I posted about this same problem over a month ago, in the TS10 section, about Well cars from JR. Myself and another fellow went through various testing procedures and came up with no decisive cause for the issue, but the issue is no doubt caused by the JR cars/script.
It has been well documented by numerous others as well, something in the JR cars/scripts is causing random JR/"JR script based" cars to be placed on an inaccessable "invisible" layer, taking with them any other rolling stock/engines coupled to them (regardless of "creator"...this is why it is so hard to diagnose, and why "you" at JR should take the time to test each individual car the way "we" the end-users are having to do. (I added "JR script based" above, because as I write this, I recall someone having the same problem with some of Dave Snow's content that uses JR Scripts.)
I have personally gone so far as to completely wipe a hard drive, using the "clean" function, and a complete fresh install of TS2010, then the newest and latest downloads from JR (within the last three weeks). No other 3rd party content installed; JR Well cars still disappear. Well cars by SoCal (from SoCal website, not JR), and Dave snow did not originally disappear, even though they use the JR script, but have since began to do the same...this is why I suspect the script, more than the Mesh or Config files.
Since I got no interest from any JR representative at the time of my thread, I just basically gave up on the JR/JR based Well cars, and have gone back to using those older units from the DLS.
--I have never had an issue with any OTHER JR cars, nor my Payware NS Hertige Engines (full pack)...only the Well cars.
--Spine cars work flawless, for diagnosis information, in-case they share "loads".
I'm not afraid to get my hands dirty, so to speak, so if you have some suggestions, I am willing to delve deep into my PC to find a solution.
-As a note, My install is outside of "Program File/Program Files (x86)", I have full "Security" permissions, I run everything "As Administrator" and UAC is turned off.
--Win7-64bit, two different computers, over three different drives, using TS2010 49933
Edit: Just re-tested; One baseboard blank "route", two parrallel tracks 20 meters apart.
-JR Husky Stack and AP53 well cars disappear, SoCal "Pacer" and ONE personal repaint of it does not, a SECOND repaint DOES disappear (odd, because they are the exact same files, save color on one TGA, Blue is OK, Yellow disappears).
-JR Spine cars DO now disappear, JR Trash Spines DO NOT
--This is done using "Display Mode-Open GL"
Edit2: Repeated using "Display Mode-DirectX"
-Same results, all "yellow" cars get placed on some inaccessable invisible layer, all cars other than "yellow" are visible, and editable.
-To help explain; all goes well when in surveyor, UNTIL a Save. After Save-close-reopen, cars are inaccessable in either Driver or Surveyor..cannot be deleted, cannot be moved, cannot be coupled to, cannot delete track they are on...only option is to delete route and start over.
--"Merging" layers down into "Route" layer does not work, deleting "Session" layer does not work. The "Layer" they get saved on goes invisible, completely inaccessable.
Edit3: Finally making progress, inexplicable as it is;
-For the first time seeing the "commonality" of the fact that only the "yellow" cars are being placed on an invisible inaccessable layer, I took the AP53 well car "B" unit and retextured it to solid purple. Placing the Yellow A, purple B and Yellow C units on the same track, but not coupled, save-exit-reopen in surveyor;
--Result: The Purple B unit stayed visible, and editable. The two original Yellow textured units disappeared to an inaccessable invisible layer, never to be editable again...
Curious to say the least...Why would Trainz place something on an inaccessable layer based on the color of the TGA files???
---More system info: Current testing done on an HP Pavilion Dv6 laptop, AMD A6 Vision CPU, AMD Radeon Graphics chip, Catalyst Control set to allow Application to control graphic properties.