Mage: Change file name export from '0.XXX' to '<study_name>.XXX'.

src/Solver/ASolver.py

@@ -67,6 +67,9 @@ class AbstractSolver(object):
         self._process = None
         self._output = None
 
+        # Last study running
+        self._study = None
+
     def __str__(self):
         return f"{self._name} : {self._type} : {self._description}"