diff --git a/src/scratchtocatrobat/converter/converter.py b/src/scratchtocatrobat/converter/converter.py
index 797617c4..655ad70b 100644
--- a/src/scratchtocatrobat/converter/converter.py
+++ b/src/scratchtocatrobat/converter/converter.py
@@ -1858,7 +1858,8 @@ def _convert_variable_block(self):
         if user_variable is None:
             # WORKAROUND: for generated variables added in preprocessing step
             # must be generated user variable, otherwise the variable must have already been added at this stage!
-            assert(_is_generated(variable_name))
+            if not _is_generated(variable_name):
+                log.warning("UserVariable with name :'" + variable_name + "' does not exist. Creating it now.")
             catrobat.add_user_variable(self.project, variable_name, self.sprite, self.sprite.getName())
             user_variable = self.scene.getDataContainer().getUserVariable(self.sprite, variable_name)