API + Custom nodes that use `print` currently broken?

NOTES:
* Using ComfyUI Electron App

Other details:

OS: Windows 11
ComfyUI v0.4.0
ComfyUI_frontend v1.33.14
Discord
ComfyOrg
ComfyUI_desktop v0.6.0
EasyUse v1.3.3
LoRA Manager v0.9.10-stable
LoRA-Manager
rgthree-comfy v1.0.2508241658

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

Expected any custom node using `print` (for example, ShowText from comfyui-custom-scripts) to work even when submitted via the API

### Actual Behavior

Node's using `print` do not work via API, but work via the UI. Have tried with three other custom nodes that use `print`, they also fail via the API but work via the UI.

### Steps to Reproduce

I recently noticed that when submitting jobs via the API, I keep getting `OSError: Errno 22] Invalid argument`

After removing problematic nodes incrementally, I realized that the common trend between all the nodes that were raising this error was the use of a `print` statement.

Here's a really simple workflow that reproduces this error

[Show Text Example Workflow.json](https://github.com/user-attachments/files/24206798/Example.of.Show.Text.json)

And the shell script to execute it via API:

```
#!/bin/bash

COMFYUI_URL=
WORKFLOW_FILE=$1

echo "Testing ShowText workflow: $WORKFLOW_FILE"
echo ""

python3 - "$COMFYUI_URL" "$WORKFLOW_FILE" << 'EOF'
import json
import sys
import requests
import time

comfyui_url = sys.argv[1]
workflow_file = sys.argv[2]

# Load workflow
with open(workflow_file, 'r') as f:
workflow = json.load(f)

# Override the string value in node "2" (easy string node)
workflow["2"]["inputs"]["value"] = "Hello from script!"

print("Submitting workflow...")
response = requests.post(f"{comfyui_url}/prompt", json={"prompt": workflow}, timeout=10)

if response.status_code != 200:
print(f"ERROR: {response.status_code}")
print(response.text)
sys.exit(1)

result = response.json()
prompt_id = result.get('prompt_id')
print(f"Submitted. Prompt ID: {prompt_id}")

# Poll for completion
print("Waiting for completion...")
while True:
time.sleep(2)

# Check status
status_response = requests.get(f"{comfyui_url}/prompt/{prompt_id}", timeout=10)
if status_response.status_code == 200:
status = status_response.json()
print(f"\nStatus response: {json.dumps(status, indent=2)}")

# Check for error in status
if status.get('status', {}).get('status_str') == 'error':
print("\n❌ STATUS ERROR DETECTED")
for msg in status.get('status', {}).get('messages', []):
if msg[0] == 'execution_error':
print(f"\nError details: {json.dumps(msg[1], indent=2)}")
sys.exit(1)

# Check history
history = requests.get(f"{comfyui_url}/history/{prompt_id}", timeout=10).json()
print(f"\nHistory response: {json.dumps(history, indent=2)}")

if prompt_id in history:
prompt_data = history[prompt_id]

# Check for error in status within history
if 'status' in prompt_data:
status = prompt_data['status']
if status.get('status_str') == 'error':
print("\n❌ EXECUTION ERROR IN HISTORY:")
for msg in status.get('messages', []):
if msg[0] == 'execution_error':
print(f"\nError details: {json.dumps(msg[1], indent=2)}")
sys.exit(1)

# Check for top-level execution_error
if 'execution_error' in prompt_data:
print("\n❌ EXECUTION ERROR:")
print(json.dumps(prompt_data['execution_error'], indent=2))
sys.exit(1)
else:
print("✓ Completed successfully")
sys.exit(0)
EOF
```

[Example of Show Text.json](https://github.com/user-attachments/files/24206871/Example.of.Show.Text.json)

### Debug Logs

```powershell
Running it:

`./test_showtext.sh "Example of Show Text.json"`

Error that I'm seeing:

Testing ShowText workflow: Example of Show Text.json

Submitting workflow...
Submitted. Prompt ID: 425f64ed-293e-4f89-a1f2-2339dbbc7aab
Waiting for completion...

History response: {
"425f64ed-293e-4f89-a1f2-2339dbbc7aab": {
"prompt": [
136,
"425f64ed-293e-4f89-a1f2-2339dbbc7aab",
{
"1": {
"inputs": {
"text_0": "foo",
"text": [
"2",
0
]
},
"class_type": "ShowText|pysssss",
"_meta": {
"title": "Show Text \ud83d\udc0d"
}
},
"2": {
"inputs": {
"value": "Hello from script!"
},
"class_type": "easy string",
"_meta": {
"title": "String"
}
}
},
{
"create_time": 1765954972625
},
[
"1"
]
],
"outputs": {},
"status": {
"status_str": "error",
"completed": false,
"messages": [
[
"execution_start",
{
"prompt_id": "425f64ed-293e-4f89-a1f2-2339dbbc7aab",
"timestamp": 1765954972626
}
],
[
"execution_cached",
{
"nodes": [
"2"
],
"prompt_id": "425f64ed-293e-4f89-a1f2-2339dbbc7aab",
"timestamp": 1765954972626
}
],
[
"execution_error",
{
"prompt_id": "425f64ed-293e-4f89-a1f2-2339dbbc7aab",
"node_id": "1",
"node_type": "ShowText|pysssss",
"executed": [],
"exception_message": "[Errno 22] Invalid argument\n",
"exception_type": "OSError",
"traceback": [
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 515, in execute\n output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 329, in get_output_data\n return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\custom_nodes\\comfyui-lora-manager\\py\\metadata_collector\\metadata_hook.py\", line 165, in async_map_node_over_list_with_metadata\n results = await original_map_node_over_list(\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 297, in _async_map_node_over_list\n await process_inputs(input_data_all, 0, input_is_list=input_is_list)\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 291, in process_inputs\n result = f(**inputs)\n ^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\custom_nodes\\comfyui-custom-scripts\\py\\show_text.py\", line 30, in notify\n print(\"Error: extra_pnginfo[0] is not a dict or missing 'workflow' key\")\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 47, in write\n self.__convertor.write(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 177, in write\n self.write_and_convert(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 205, in write_and_convert\n self.write_plain_text(text, cursor, len(text))\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 210, in write_plain_text\n self.wrapped.write(text[start:end])\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 47, in write\n self.__convertor.write(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 177, in write\n self.write_and_convert(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 205, in write_and_convert\n self.write_plain_text(text, cursor, len(text))\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 210, in write_plain_text\n self.wrapped.write(text[start:end])\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\comfyui_manager\\prestartup_script.py\", line 324, in write\n self.sync_write(message)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\comfyui_manager\\prestartup_script.py\", line 345, in sync_write\n original_stdout.flush()\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\app\\logger.py\", line 35, in flush\n super().flush()\n"
],
"current_inputs": {
"text": [
"Hello from script!"
],
"unique_id": [
"1"
],
"extra_pnginfo": [
null
]
},
"current_outputs": [
"1",
"2"
],
"timestamp": 1765954972628
}
]
]
},
"meta": {}
}
}

❌ EXECUTION ERROR IN HISTORY:

Error details: {
"prompt_id": "425f64ed-293e-4f89-a1f2-2339dbbc7aab",
"node_id": "1",
"node_type": "ShowText|pysssss",
"executed": [],
"exception_message": "[Errno 22] Invalid argument\n",
"exception_type": "OSError",
"traceback": [
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 515, in execute\n output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 329, in get_output_data\n return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\custom_nodes\\comfyui-lora-manager\\py\\metadata_collector\\metadata_hook.py\", line 165, in async_map_node_over_list_with_metadata\n results = await original_map_node_over_list(\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 297, in _async_map_node_over_list\n await process_inputs(input_data_all, 0, input_is_list=input_is_list)\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\execution.py\", line 291, in process_inputs\n result = f(**inputs)\n ^^^^^^^^^^^\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\custom_nodes\\comfyui-custom-scripts\\py\\show_text.py\", line 30, in notify\n print(\"Error: extra_pnginfo[0] is not a dict or missing 'workflow' key\")\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 47, in write\n self.__convertor.write(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 177, in write\n self.write_and_convert(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 205, in write_and_convert\n self.write_plain_text(text, cursor, len(text))\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 210, in write_plain_text\n self.wrapped.write(text[start:end])\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 47, in write\n self.__convertor.write(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 177, in write\n self.write_and_convert(text)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 205, in write_and_convert\n self.write_plain_text(text, cursor, len(text))\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\colorama\\ansitowin32.py\", line 210, in write_plain_text\n self.wrapped.write(text[start:end])\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\comfyui_manager\\prestartup_script.py\", line 324, in write\n self.sync_write(message)\n",
" File \"C:\\Users\\olive\\workspace\\ComfyUI\\.venv\\Lib\\site-packages\\comfyui_manager\\prestartup_script.py\", line 345, in sync_write\n original_stdout.flush()\n",
" File \"C:\\Users\\olive\\AppData\\Local\\Programs\\@comfyorgcomfyui-electron\\resources\\ComfyUI\\app\\logger.py\", line 35, in flush\n super().flush()\n"
],
```

### Other

_No response_

Start by running the supplied API shell script with the linked Show Text workflow and compare it with UI execution. Trace the reported path through execution.py, custom_nodes/comfyui-custom-scripts/py/show_text.py, colorama, comfyui_manager/prestartup_script.py, and app/logger.py. Done means the workflow completes through the API without the reported OSError.

Written by the indexing model from the issue text.