PythonScript 3.0.24.0 - "PluginsManager:runPluginCommand Exception" dialog with "Access Violation" with one of my scripts.

[Jay S]

Overview

Hi, I need help with the Python3 version of PythonScript.

I’m using the latest release from here: https://github.com/bruderstein/PythonScript/releases/tag/v3.0.24

My current scripts are all working fine, but I created a new script today (via Claude Opus 4.5) to transform a specific JSON format to another. Claude has never failed me until today.

The script is intended to convert valid RGB values in the input, and then replace each value with the equivalent HTML Hex value.

This is my script (FM TransformColorJsonRgbToHex.py):

# -*- coding: utf-8 -*-
"""
RGB to Hex Color Converter for Notepad++ PythonScript
Converts RGB color values like "22, 22, 24" to hex format "#161618"
Handles selection or entire document with full undo support.
"""

import re

def rgb_to_hex(match):
    """
    Convert an RGB string match to hex format.
    
    Args:
        match: Regex match object containing RGB values
        
    Returns:
        Hex color string in format "#RRGGBB"
    """
    try:
        r = int(match.group(1).strip())
        g = int(match.group(2).strip())
        b = int(match.group(3).strip())
        
        # Clamp values to valid RGB range
        r = max(0, min(255, r))
        g = max(0, min(255, g))
        b = max(0, min(255, b))
        
        return '"#{:02X}{:02X}{:02X}"'.format(r, g, b)
    except (ValueError, AttributeError):
        # Return original if conversion fails
        return match.group(0)


def convert_rgb_to_hex(text):
    """
    Convert all RGB color values in text to hex format.
    
    Matches patterns like:
        "22, 22, 24"
        "255, 128, 0"
        " 22 , 22 , 24 " (with extra whitespace)
    
    Args:
        text: Input text containing RGB color values
        
    Returns:
        Text with RGB values converted to hex
    """
    # Pattern matches quoted RGB values: "R, G, B"
    # Captures three groups of digits separated by commas
    # Allows flexible whitespace
    pattern = r'"(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})"'
    
    return re.sub(pattern, rgb_to_hex, text)


def main():
    """Main entry point for the script."""
    
    # Check if there's a selection
    selection_start = editor.getSelectionStart()
    selection_end = editor.getSelectionEnd()
    has_selection = selection_start != selection_end
    
    # Begin undo action for single-step undo
    editor.beginUndoAction()
    
    try:
        if has_selection:
            # Process only selected text
            selected_text = editor.getSelText()
            converted_text = convert_rgb_to_hex(selected_text)
            
            if selected_text != converted_text:
                editor.replaceSel(converted_text)
                notepad.messageBox(
                    "RGB to Hex conversion complete (selection).",
                    "Conversion Complete",
                    0
                )
            else:
                notepad.messageBox(
                    "No RGB color values found in selection.",
                    "No Changes",
                    0
                )
        else:
            # Process entire document
            full_text = editor.getText()
            converted_text = convert_rgb_to_hex(full_text)
            
            if full_text != converted_text:
                # Preserve cursor position
                current_pos = editor.getCurrentPos()
                editor.setText(converted_text)
                
                # Restore cursor (adjust if position is now out of bounds)
                new_length = editor.getTextLength()
                editor.gotoPos(min(current_pos, new_length))
                
                notepad.messageBox(
                    "RGB to Hex conversion complete (entire document).",
                    "Conversion Complete",
                    0
                )
            else:
                notepad.messageBox(
                    "No RGB color values found in document.",
                    "No Changes",
                    0
                )
    finally:
        # Always end undo action, even if an error occurs
        editor.endUndoAction()


# Execute the script
main()

This is my input (I’ve tried running on selection as well as the whole file):

{
  "Name": "Some Name",
  "BackgroundColor": "22, 22, 24",
  "LightBackgroundColor": "19, 19, 21",
  "DarkBackgroundColor": "14, 14, 15",
  "TextColor": "227, 227, 239",
  "BorderColor": "39, 39, 42",
  "CheckerColor": "213, 188, 170",
  "CheckerColor2": "212, 146, 146",
  "CheckerSize": 17,
  "LinkColor": "95, 136, 255",
  "MenuHighlightColor": "44, 44, 52",
  "MenuHighlightBorderColor": "28, 28, 34",
  "MenuBorderColor": "28, 28, 34",
  "MenuCheckBackgroundColor": "186, 219, 130",
  "MenuFont": "Roboto, 14px",
  "ContextMenuFont": "Roboto, 14px",
  "ContextMenuOpacity": 100,
  "SeparatorLightColor": "255, 75, 238",
  "SeparatorDarkColor": "25, 25, 28"
}

Error when Running Script

When I run the script, Notepad++ throws up an “Access Violation” dialog.

PluginsManager::runPluginCommand Exception
Access Violation

Other Screenshots:

 

I have a lot of custom toolbar customization, ignore that please for now.

---

Ways to debug this?

This is really frustrating to diagnose because even though I have the “Show Console” enabled for PythonScript globally, it doesn’t seem to show the error in the console at all, and I have no way of knowing what line or specific section of code is throwing this error.

All of my old scripts work completely fine, so I don’t think this is an installation issue. Can someone possibly spot what’s wrong with my script or at least provide me with a better way to debug this? I have no clue what to do in order to diagnose this bug.

Any help would be super amazing!

Thanks.