Bugfix EDFTomoScan

tomoscan/esrf/edfscan.py

@@ -84,6 +84,7 @@ class EDFTomoScan(TomoScanBase):
         self.__ref_on = None
         self.__scan_range = None
         self._edf_n_frames = n_frames
+        self.__distance = None
         self.update()
 
     @docstring(TomoScanBase.clear_caches)