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[Bug]: Failed to get input node 0 for group node child 99:1 with slot 0 #4989

@timfocus6

Description

@timfocus6

Prerequisites

  • I am running the latest version of ComfyUI
  • I have searched existing issues to make sure this isn't a duplicate
  • I have tested with all custom nodes disabled (see how)

What happened?

After updating ComfyUI three days ago using both the Comfy CLI (comfy install) and the standard installation, I encountered the following error when converting nodes into a group:

"Failed to get input node 0 for group node child 99:1 with slot 0"

The error occurs only after the update—when I connect one node’s output to another node’s input and then convert them into a group node, the error immediately appears.

Steps to Reproduce

Image

How is this affecting you?

Workflow won't execute

ComfyUI Frontend Version

ComfyUI version: 0.3.49 ComfyUI frontend version: 1.24.4

Browser

Chrome/Chromium

Console Errors

"Failed to get input node 0 for group node child 99:1 with slot 0"

Logs

Additional Context

No response

┆Issue is synchronized with this Notion page by Unito

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