diff --git a/FCADLogger.py b/FCADLogger.py
index 8a5be9e..6d93381 100644
--- a/FCADLogger.py
+++ b/FCADLogger.py
@@ -110,4 +110,4 @@ class FCADLogger:
 
             import PySide
             PySide.QtGui.QMessageBox.critical(
-                    FreeCADGui.getMainWindow(),'Assembly',e.message)
+                    FreeCADGui.getMainWindow(),'Assembly',str(e))
diff --git a/solver.py b/solver.py
index 45962d5..689b685 100644
--- a/solver.py
+++ b/solver.py
@@ -110,7 +110,7 @@ class Solver(object):
                     msg += '\n{}, handle: {}'.format(cstrName(cstr),h)
                 logger.error(msg)
             raise RuntimeError('Failed to solve {}: {}'.format(
-                objName(assembly),e.message))
+                objName(assembly),str(e)))
         self.system.log('done solving')
 
         touched = False