No module named 'manager_core'

[davedaverave]

I've got ComfyUI-Manager import failed, and read this error in console .... Cannot import /notebooks/ComfyUI/custom_nodes/ComfyUI-Manager module for custom nodes: No module named 'manager_core'

My enviroment is in python 3.9 and can't get update, i don't know if that's causing the issue
Thanks

[Dr.Lt.Data]

It seems that your ComfyUI-Manager installation isn't valid.
Remove and reinstall it.

[Gavin Adams]

I'm getting this also when attempting to install ComfyUI-Manager into stable diffusion webui docker. Is there a specific version of ComfyUI needed for Manager?

[ctxwing]

i got just same as @gadams999 mentioned. i am installing ans setting just as "install ComfyUI-Manager into stable diffusion webui docker. Is there a specific version of ComfyUI needed for Manager?" got bumped same error. any solution or workaround ?

[Dr.Lt.Data]

I'm getting this also when attempting to install ComfyUI-Manager into stable diffusion webui docker. Is there a specific version of ComfyUI needed for Manager?

Unless your ComfyUI is a very old version, this typically doesn't cause problems.
What command did you use to install ComfyUI-Manager?

[Asa Jay]

This issue was fixed for me by installing the python package spandrel.

This here was my initial error output, which doesn't mention it, the error was higher up in the startup log.

pytorch version: 2.1.1+cu121
xformers version: 0.0.23
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 4080 : cudaMallocAsync
Traceback (most recent call last):
  File "/mnt/S870P1/comfyui/nodes.py", line 1931, in load_custom_node
    module_spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager/__init__.py", line 6, in <module>
    from .glob import manager_server
  File "/mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager/glob/manager_server.py", line 18, in <module>
    import manager_core as core
ModuleNotFoundError: No module named 'manager_core'

Cannot import /mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager module for custom nodes: No module named 'manager_cor
e'

[Dr.Lt.Data]

This issue was fixed for me by installing the python package spandrel.

This here was my initial error output, which doesn't mention it, the error was higher up in the startup log.

pytorch version: 2.1.1+cu121
xformers version: 0.0.23
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 4080 : cudaMallocAsync
Traceback (most recent call last):
  File "/mnt/S870P1/comfyui/nodes.py", line 1931, in load_custom_node
    module_spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager/__init__.py", line 6, in <module>
    from .glob import manager_server
  File "/mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager/glob/manager_server.py", line 18, in <module>
    import manager_core as core
ModuleNotFoundError: No module named 'manager_core'

Cannot import /mnt/S870P1/comfyui/custom_nodes/ComfyUI-Manager module for custom nodes: No module named 'manager_cor
e'

Because spandrel is a basic dependency package for ComfyUI, there should not be any issues if ComfyUI was installed or updated correctly.

I've learned about the situation where this error message occurs. Thanks

[Povl Filip Sonne-Frederiksen]

For me, the fix was changing the import to be relative.

diff --git a/glob/manager_server.py b/glob/manager_server.py
index e2f8989..ecfd8a0 100644
--- a/glob/manager_server.py
+++ b/glob/manager_server.py
@@ -13,7 +13,7 @@ import shutil
 import git
 
 from server import PromptServer
-import manager_core as core
+from . import manager_core as core
 import cm_global
 
 print(f"### Loading: ComfyUI-Manager ({core.version_str})")