Ha - definitely a bug somewhere. It’s somehow detecting your cache output (a single filename) as an iterable, so it splits it up per character. Here’s the simplified output log of the issue:
[
"/path/to/p",
"/path/to/o",
"/path/to/i",
"/path/to/n",
"/path/to/t",
"/path/to/c",
"/path/to/a",
"/path/to/c",
"/path/to/h",
"/path/to/e",
"/path/to/A",
"/path/to/b",
"/path/to/c",
"/path/to/M",
"/path/to/a",
"/path/to/i",
"/path/to/n",
"/path/to/.",
"/path/to/a",
"/path/to/b",
"/path/to/c"
]
Which shows that the string pointcacheMain.abc
is somehow misidentified somewhere as a list/iterable.
This is a farm submission I see - which sounds like it could be related to this issue: AY-6230 - Submitting pointcache product type to farm is always a single file · Issue #58 · ynput/ayon-houdini · GitHub