Old 3rd party content in new Trainz versions .

All TRS19 content should run in 22, Most (if not all) TANE content should also run. TS12 is less likely but many should run.

Most if not all TANE content should run in TRS19. Most TS12 content, with less certainty, should also run in TRS19.

Most TS12 content will run in TANE.

There will always be examples of assets in routes and sessions that "seemed" to work fine in older Trainz versions that either will not work in the latest versions or will cause performance issues. In reality, many of these assets only "seemed" to work because Trainz in the past has been very loose with standards and enforcement.

In the early days, for example, config.txt files that had incorrect, poorly formatted and even incorrectly spelt tags, were accepted (but those tags were usually ignored). Thankfully, not today where even a missing thumbnail image will cause a rejection. The standards have, at long last, been tightened up but there is till a way to go. Some asset features, such as LODs (level of detail), are still optional in the latest versions but will, eventually, become mandatory.
 
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Looks like i have to install multiply versions of the game if i want to play old routes without any errors or spending hours to fix them . =(
 
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