SmartFade (non-ML) show files have changed format over the course of development. This means showfiles have a few stepping stones they need to pass through to maintain compatibility. The procedure listed below should help you upgrade a show file to current software.
Show files created on SmartFade Small (1248/1296) and Large (2496) consoles are not compatible with each other. The smaller consoles have 24 masters and the large console has 48 masters, so the memory layout is different between the sizes. As a result you cannot transfer show files between the consoles.
Show files from SmartFade consoles are also not compatible with SmartFade ML consoles.