The messages the app shows when something does not go as planned, grouped by where they appear, each with what to do.
How messages and dialogs look: Messages and dialogs. When the assistant cannot
answer: Failed answers.
#When the app starts
| Message | What to do |
|---|
| "Your data was saved by a newer version of the app. Install that version again to open it. Nothing was changed." | Install the newer version again, or start with another data folder (--user-data-dir). |
| The app's data file is damaged | Start with empty data puts the damaged file aside under a new name; Open folder shows it. Project and workflow files are not affected. |
| "The app's data file in … is damaged and could not be put aside. Move the file comfyui-desktop.db out of that folder, then start the app again." | Move the file by hand, then start again. |
| "The app cannot write to its data folder …" | Make sure the folder belongs to you and the disk is not read-only. |
| "There is no free space on the disk for the app's data." | Free some space; your data is kept. |
| "The app's data file is in use by another program." | Close the other program (a second copy of the app, a backup tool, a database viewer). |
| … could not start "The app could not start. The log is in …" | Open the log; see Troubleshooting. |
#Opening and saving files
| Message | What to do |
|---|
| "This file was in the API format, which has no positions: the app laid the nodes out from left to right." | Nothing: the API file opened. Arrange it if you like (Ctrl+Shift+L). |
| "This file is not a workflow: its text could not be read." | The file is not JSON or is cut off. Save it again from ComfyUI. |
| "There is no workflow in this file…" | The picture or video was not saved by ComfyUI, or a chat app removed the workflow. Open the original file or the .json. |
| "This kind of file cannot be opened here…" | Open a workflow (.json), a project, or a picture or video saved by ComfyUI. |
| "This file is no longer there: it was moved or deleted." | A file of File ▸ Open recent moved; open it from its new place. |
| "This file is too large to open." | The file is larger than 64 MB. |
| "This graph is too large to open (… nodes, … links)…" | The app opens graphs of up to 1500 nodes and 3000 links. Nothing was changed. Known limitations |
| "This file is protected from writing…" | Choose another name, or allow writing to the file in its properties. |
| "This file is not a … project." | Open it with File ▸ Open workflow… if it is a workflow. |
| "This project file version is not supported (N). Update the app to open it." | The file was saved by a newer version. |
| "The project file is damaged. Open another copy of the project." | Use another copy. |
| "This folder cannot be written to. Pick another folder." | Save to a folder of yours. |
| "There is no free space on the disk. Free some space or pick another disk." | Free some space. |
| "This file is not a node list saved from ComfyUI." | File ▸ Load node list from file… needs the answer of ComfyUI's /object_info. |
| N fields look like a key or token | Save without these values keeps the key out of the file. |
#While you edit the graph
| Message | What to do |
|---|
| "The change could not be saved. The graph is as it was before it." | Usually a full disk; free some space and repeat the change. |
| "That edit was not applied" | The graph changed in between (for example the assistant built a step). Repeat the edit. |
| "The inputs and outputs of this node are not known yet: start ComfyUI and sync" | Read ComfyUI again with Sync ▸ Sync now. |
| "A subgraph cannot go inside itself, directly or through another subgraph." | Choose other nodes for the subgraph. |
#The assistant
| Message | What to do |
|---|
| "The cloud assistant has no key. Add it in Settings ▸ Assistant." | Paste the key: Keys. |
| "No model is chosen for the cloud assistant." / "No model is chosen on your own server." | Choose a model in Settings ▸ Assistant. |
| "A cloud key is never sent to an http address. Use an address that starts with https." | Correct the address. |
| "The address of your own server is not set." | Enter it in Settings ▸ Assistant, for example http://127.0.0.1:11434/v1. |
| "The provider refused the key." | The key is wrong, revoked or for another provider. |
| "The server did not answer." / "The server did not send the model list in time." | Start the server; check the address. |
| "This model cannot call tools, and without them the assistant cannot read the graph…" | Choose a model marked "tools" in the model list. |
More, including the messages inside an answer: Failed answers.
#Connection and sync
Every message about the ComfyUI address and the MCP server, with its cause and what to do, is on one page:
Connection problems.
#Keys and settings
| Message | What to do |
|---|
| "Settings cannot hold a key or a password. Remove it from the field." | A key goes into its own key field, never into an address or a name. |
| "An explanation cannot hold a key or a password. Remove it from the text." | Remove the key from the note. |
| "Kept for this session only: the system keychain did not confirm encryption." | The keychain did not open; see Troubleshooting. |
| "Stored settings could not be read; default settings are shown." | Check and save the settings again. |
#See also