Исправлен объект process

pym/calculate/lib/utils/files.py

@@ -191,7 +191,8 @@ class process(StdoutableProcess):
 
     def get_stdout(self):
         """Get current stdout"""
-        self.close()
+        if self.pipe:
+            self.close()
         self._open()
         self.cacheresult = ""
         return self.pipe.stdout