--- a/src/eric7/Plugins/PluginSyntaxChecker.py	Wed Nov 16 10:10:06 2022 +0100
+++ b/src/eric7/Plugins/PluginSyntaxChecker.py	Wed Nov 16 10:53:40 2022 +0100
@@ -322,7 +322,7 @@
         extensions = tuple(self.syntaxCheckService.getExtensions())
         files = [
             os.path.join(ppath, file)
-            for file in project.pdata["SOURCES"]
+            for file in project.getProjectData(dataKey="SOURCES")
             if file.endswith(extensions)
         ]