--- a/Plugins/UiExtensionPlugins/PipInterface/PipListDialog.py Thu Feb 08 18:58:07 2018 +0100 +++ b/Plugins/UiExtensionPlugins/PipInterface/PipListDialog.py Fri Feb 09 18:53:08 2018 +0100 @@ -253,6 +253,8 @@ self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(True) self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True) self.__refreshButton.setEnabled(False) + if self.__upgradeAllButton is not None: + self.__upgradeAllButton.setEnabled(False) QApplication.processEvents() QApplication.setOverrideCursor(Qt.WaitCursor)