--- a/eric7/Toolbox/SingleApplication.py	Mon May 17 19:58:15 2021 +0200
+++ b/eric7/Toolbox/SingleApplication.py	Tue May 18 18:19:47 2021 +0200
@@ -77,8 +77,7 @@
                             """<p>Error: {0}</p>"""
                             """<p>Data:<br/>{1}</p>""").format(
                         str(err), Utilities.html_encode(line.strip())),
-                    E5MessageBox.StandardButtons(
-                        E5MessageBox.Ok))
+                    E5MessageBox.Ok)
                 return
             
             command = commandDict["command"]