JDCN_AnyFileSelector

JDCN_AnyFileSelector is the "pick one" node for file lists. Feed it a list of paths, tell it which index you want, and it hands back a single path. Where JDCN_AnyFileList gives you a whole folder as a list, this node narrows a list down to the one item you actually want to use this run.

How it works

The node takes a List of strings (it's list-input, so wire the PathList output from JDCN_AnyFileList or JDCN_AnyFileListRandom straight into it), an Index integer, and a Change dropdown with fixed, increment, and decrement options. The single output, out, is one string from the list.

Index is 1-based, so Index = 1 grabs the first element. The mechanism underneath is literally List[Index - 1] - nothing fancier. That's also why the Change dropdown is worth a little honesty: in the actual code, it's a UI hint, not logic. The node always returns the element at Index - 1; fixed / increment / decrement is just a label describing how you plan to move the index between runs. If you want automatic incrementing, you drive Index from a counter yourself.

When you'd use it

• You want to sample one image from a folder of references per run.
• You're chaining: AnyFileList → AnyFileSelector → AnyCheckpointLoader, and changing the index swaps which checkpoint you load without opening the loader.
• You want a manual "next / previous" feel in an animation or gallery workflow - bump the index, queue again, get the next file.

Because it's a pure string passthrough, the selected path plugs into anything that accepts a file path: loaders, movers, image loaders, text savers.

Installing it

Part of ComfyUI-JDCN:

• ComfyUI Manager → Install Custom Node → search JDCN → install ComfyUI-JDCN → restart.
• Or clone manually:

cd ComfyUI/custom_nodes
git clone https://github.com/daxcay/ComfyUI-JDCN.git
cd ComfyUI-JDCN
pip install -r requirements.txt

Restart ComfyUI; the node lives under 🔵 JDCN 🔵. The pack's only dependency is piexif, no models to grab.

Common issues

The two failure modes both print Error in List Variable and return nothing: an empty list, or an index out of range (below 1 or past the end of the list). Both are easy to hit if you point it at an empty folder or forget that the index is 1-based. Also remember it wants a list input - if you hand it a single string, you'll get confusion rather than a selection.

If your selected file doesn't do what you expected, double-check you're reading the list order correctly. The list nodes in this pack return files in OS order, which isn't necessarily alphabetical - see the AnyFileList article for that quirk.