diff -r 98a76dbb1b6d -r ca814b175391 ProjectController.py
--- a/ProjectController.py	Fri Oct 28 14:26:17 2022 +0800
+++ b/ProjectController.py	Fri Oct 28 14:53:23 2022 +0800
@@ -806,8 +806,8 @@
             plc_file.write(POUsIECCodeContent)
 
         hasher = hashlib.md5()
-        hasher.update(IECCodeContent)
-        hasher.update(POUsIECCodeContent)
+        hasher.update(IECCodeContent.encode())
+        hasher.update(POUsIECCodeContent.encode())
         self.IECcodeDigest = hasher.hexdigest()
 
         return True