Object of type "NodeOutput" has no len()

[yovsac]

Hi,

I opened a workflow that I was using a few weeks ago with tiny terra nodes for creating an xy plot and I keep getting this error when I run it.

Ive reinstalled the nodes and have updated to the latest comfyui, but still get the same error.

[TTTTong777]

你好

我打开了一个工作流，几周前我正在使用该工作流程，其中包含用于创建 xy 图的微小 terra 节点，当我运行它时我不断收到此错误。

我重新安装了节点并更新到最新的 comfyui，但仍然收到相同的错误。

请问解决了吗，我也遇到了

[Dannyboy2000]

I'm also getting the same issues.
Can someone help and tell us how to fix this problem.

Thanks

[juanml82]

Same issue, no idea what is it about

[zltsmn]

Same issue(

[liao942287300-cyber]

Same issue

[rjgoif]

The newer version of ComfyUI has changed how node outputs work and now returns NodeOutput objects instead of simple tuples/lists. The issue is in the ttn executor code which is trying to get the length of this object, which doesn't support len().

Here's the fix.

1. Back up ttNexecutor.py as something like ttNexecutor.py.bak so you can revert if needed.
2. Go into ttNexecutor.py and replace the entire function get_output_data with this block:

def get_output_data(obj, input_data_all):
    results = []
    uis = []
    return_values = map_node_over_list(obj, input_data_all, obj.FUNCTION, allow_interrupt=True)
    for r in return_values:
        if isinstance(r, dict):
            if 'ui' in r:
                uis.append(r['ui'])
            if 'result' in r:
                results.append(r['result'])
        else:
            results.append(r)
    output = []
    if len(results) > 0:
        # check which outputs need concatenating
        # Handle both old tuples and new NodeOutput objects
        first_result = results[0]
        try:
            # Try to get length directly (works for tuples/lists)
            result_len = len(first_result)
        except TypeError:
            # If len() fails, it's likely a NodeOutput - convert it
            try:
                first_result = tuple(first_result)
                results[0] = first_result
                result_len = len(first_result)
            except:
                # Single value output
                result_len = 1
                results[0] = (first_result,)
        
        output_is_list = [False] * result_len
        
        if hasattr(obj, "OUTPUT_IS_LIST"):
            output_is_list = obj.OUTPUT_IS_LIST
        # merge node execution results
        for i, is_list in zip(range(len(results[0])), output_is_list):
            if is_list:
                output.append([x for o in results for x in o[i]])
            else:
                output.append([o[i] for o in results])
    ui = dict()    
    if len(uis) > 0:
        ui = {k: [y for x in uis for y in x[k]] for k in uis[0].keys()}
    return output, ui

Save, reboot comfyui, and refresh your browser.

Tested this with a "broken" workflow and it worked. Your results may vary.

Here's to hoping that the author returns to update this suite soon. I love ttn!

@TinyTerra what do you think?