How to Fix Missing Nodes in ComfyUI Workflows

If you load a ComfyUI workflow and see a popup saying "The following node types were not found" or nodes appear as red boxes, the workflow uses custom nodes that are not installed in your ComfyUI environment.

This is one of the most common issues when sharing or downloading workflows. The workflow file stores node type names, but the actual node code must be installed separately.

What it looks like

When you load a workflow with missing nodes, ComfyUI shows:

When loading the graph, the following node types were not found:
  - KSamplerAdvanced (Custom)
  - ControlNetApplyAdvanced
  - IPAdapterApply
  - CLIPTextEncodeSDXL

In the workflow canvas, missing nodes appear as red rectangles with the node type name displayed.

Why it happens

• Workflow from another user: They had custom nodes installed that you do not have
• Custom nodes not installed: The workflow uses node packs that must be separately installed
• Custom nodes installed but not loaded: The node pack exists in custom_nodes/ but failed to import
• Different ComfyUI version: Some built-in nodes were added in newer versions
• Node renamed or removed: The custom node pack updated and renamed or removed a node type

Step-by-step fix

Step 1: Identify the missing nodes

The popup when loading the workflow lists all missing node types. Write them down or take a screenshot.

If you dismissed the popup, you can also:

• Look for red boxes in the workflow canvas
• Check the ComfyUI startup log for IMPORT FAILED messages
• Open the workflow JSON file and search for node type names

Step 2: Use ComfyUI Manager to find and install them

If you have ComfyUI Manager installed:

1. Click Manager in the ComfyUI menu
2. Click Install Missing Custom Nodes
3. ComfyUI Manager will try to match missing node types to known custom node packs
4. Install the suggested packs
5. Restart ComfyUI

Step 3: Manual installation if Manager cannot find them

Some custom nodes are not in ComfyUI Manager's registry. You need to find them manually:

1. Search GitHub for the node type name (e.g., "IPAdapterApply" comfyui custom node)
2. Clone the repo into your custom_nodes/ folder:

cd ComfyUI\custom_nodes
git clone https://github.com/author/ComfyUI-NodePack.git

3. Install the node's requirements:

.\python_embeded\python.exe -s -m pip install -r ComfyUI\custom_nodes\ComfyUI-NodePack\requirements.txt

4. Restart ComfyUI

Step 4: If nodes are installed but still show red

If the custom node folder exists but nodes still show as red or missing:

• Check the startup log for IMPORT FAILED — the node pack may have a dependency error
• The node pack may need to be updated: cd ComfyUI\custom_nodes\<pack> && git pull
• A Python package required by the node may be missing — see the traceback for details

Step 5: Verify

After installing all missing nodes and restarting, load the workflow again. All nodes should appear with their normal colors and be fully functional.

Built-in vs custom nodes

Some nodes that look custom are actually built-in to ComfyUI but were added in a specific version. If a missing node has a generic name (like KSampler or VAEDecode), you may need to update ComfyUI itself:

cd ComfyUI
git pull

When not to run pip install blindly

• Do not install requirements from every custom node pack at once — they may conflict
• Read the requirements.txt before running it to check for torch downgrades
• If a node pack is very old or unmaintained, consider finding an alternative
• Some node packs have complex build requirements (C++ compilation, CUDA extensions) that may not work on all systems

How Wonderful Launcher can help

Wonderful Launcher can help detect missing nodes when you import a workflow and guide you through installing the required custom node packs safely. It helps manage dependencies to reduce conflicts between node packs.

Download Wonderful Launcher — it's free and makes workflow sharing easier.

Related errors

• ComfyUI Workflow Red Nodes
• Nodes Show Red After Importing Workflow
• ComfyUI Plugin Import Failed
• Install Custom Nodes
• ComfyUI Manager

Source References

• ComfyUI GitHub
• ComfyUI Documentation
• ComfyUI Manager GitHub