diff --git a/src/cplus_plugin/gui/qgis_cplus_main.py b/src/cplus_plugin/gui/qgis_cplus_main.py
index 6a26b48bd..d31f00918 100644
--- a/src/cplus_plugin/gui/qgis_cplus_main.py
+++ b/src/cplus_plugin/gui/qgis_cplus_main.py
@@ -1535,6 +1535,7 @@ def run_analysis(self):
         Creates new QgsTask, progress dialog and report manager
          for each new scenario analysis.
         """
+        self.log_text_box.clear()
 
         extent_list = PILOT_AREA_EXTENT["coordinates"]
         default_extent = QgsRectangle(