Now showing an error when the ConversionRules folder wasn't found and when the ConversionRules folder didn't contain any JSON files.

Author: MyNameIsTrez

main.py

@@ -1,6 +1,6 @@
 # Run manually: python main.py
 
-# Build exe not from spec: pyinstaller --noconsole --onefile --icon=Media/cclmc-icon.ico --add-data "Media/github-icon.png;Media" --add-data "Media/discord-icon.png;Media" --add-data "Media/finish.wav;Media" --add-data "ConversionRules;ConversionRules" --name="Legacy Mod Converter" main.py
+# Build exe not from spec: pyinstaller --noconsole --onefile --icon=Media/cclmc-icon.ico --add-data "Media/github-icon.png;Media" --add-data "Media/discord-icon.png;Media" --add-data "Media/finish.wav;Media" --name="Legacy Mod Converter" main.py
 # Build exe from spec (can be outdated): pyinstaller "Legacy Mod Converter.spec"
 
 from Python import gui

python/convert.py

@@ -2,6 +2,7 @@
 from pathlib import Path
 from jsoncomment import JsonComment
 from playsound import playsound
+import PySimpleGUI as sg
 
 from Python import shared_globals as cfg
 
@@ -28,11 +29,23 @@ def resource_path(relative_path):
 def	load_conversion_rules():
 	json_parser = JsonComment(json)
 
-	for name in os.listdir(resource_path("ConversionRules")):
-		if name.endswith(".json"):
-			path = os.path.join(resource_path("ConversionRules"), name)
-			with open(path) as f:
-				conversion_rules.update(json_parser.load(f))
+	github_url = "https://github.com/cortex-command-community/Cortex-Command-Legacy-Mod-Converter"
+
+	json_files_found = 0
+	try:
+		for name in os.listdir("ConversionRules"):
+			if name.endswith(".json"):
+				path = os.path.join("ConversionRules", name)
+				with open(path) as f:
+					json_files_found += 1
+					conversion_rules.update(json_parser.load(f))
+	except:
+		sg.Popup("The folder 'ConversionRules' wasn't found next to this executable. You can get the missing folder from the Legacy Mod Converter GitHub repo:", github_url)
+		sys.exit()
+	
+	if json_files_found == 0:
+		sg.Popup("The folder 'ConversionRules' didn't contain any JSON files. You can get the JSON files from the Legacy Mod Converter GitHub repo:", github_url)
+		sys.exit()
 
 load_conversion_rules()