> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-codex-simplify-get-started.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Fix a workflow that will not run

> Find the next step when a workflow is missing a model, node, input, account, or credits.

When you load a template or a workflow shared by someone else, ComfyUI may need files, nodes, inputs, or account access that are not included in the workflow. Start with the first warning you see.

| What you see                                    | What it usually means                                          | Next step                                                                                                                                                              |
| ----------------------------------------------- | -------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Missing model** or an empty model selector    | A local model file is unavailable or in the wrong folder       | Open the model details, download the requested file, place it in the indicated folder, then refresh or restart ComfyUI. See [model files](/basic-concepts/models).     |
| **Missing node**                                | The workflow uses a node your installation does not have       | Try a built-in template, or [install the required custom node](/installation/install_custom_node). Update ComfyUI if the missing node is part of a newer core release. |
| **Missing image, video, audio, or other input** | The workflow expects a file or prompt you have not provided    | Find the input node or panel, provide the requested file or text, then run again.                                                                                      |
| **Sign-in, network, or credit error**           | A Partner Node or Comfy Cloud node is calling a hosted service | Check your connection, sign in to your Comfy account, and check your credits. See [where workflows run](/get_started/where-work-runs).                                 |

## Check the workflow before installing anything

A workflow file stores its steps and settings. It does not bundle every model, custom node, or input file used by its creator. Look at the missing-item warning and identify which category it belongs to. You do not need to install custom nodes to fix a missing model, and downloading a model will not fix an account or credit error.

If a built-in template still fails after you satisfy its listed requirements, check [Workflow Templates](/interface/features/template) for model folder details or visit the [troubleshooting guide](/troubleshooting/overview).