Images without cryptomatte metadata will fail due to the layer index/id check. A better error could be raised.
[Cryptomatte][dev][ERROR] layer (index 1) not present in metadata
...Cryptomatte/fusion/Modules/Lua/cryptomatte_utilities.lua:614: ERROR
stack traceback:
[C]: in function 'error'
...Cryptomatte/fusion/Modules/Lua/cryptomatte_utilities.lua:614: in function 'log_error'
...iau/repo/Cryptomatte/fusion/Fuses/Matte/cryptomatte.fuse:280: in function <...iau/repo/Cryptomatte/fusion/Fuses/Matte/cryptomatte.fuse:249>
dev failed at time 1001
Images without cryptomatte metadata will fail due to the layer index/id check. A better error could be raised.