--- a/eric7/DebugClients/Python/DebugClientBase.py	Fri Jul 30 13:43:42 2021 +0200
+++ b/eric7/DebugClients/Python/DebugClientBase.py	Fri Jul 30 13:44:39 2021 +0200
@@ -922,6 +922,7 @@
                 self.cover.start()
             self.debugging = params["debug"]
             if params["debug"]:
+                self.multiprocessSupport = False
                 locals_ = locals()
                 self.threads.clear()
                 self.attachThread(mainThread=True)