diff --git a/script/RobotTCP.py b/script/RobotTCP.py
index e54737e..f639f66 100644
--- a/script/RobotTCP.py
+++ b/script/RobotTCP.py
@@ -380,7 +380,7 @@ class RobotTCP(TcpDevice, Stoppable):
     #High-level, exclusive motion task.
     def start_task(self, program, *args,  **kwargs):
         for task in (self.high_level_tasks + [program]):
-            if self.get_task_status(task)>=0:
+            if self.get_task_status(task)[0]>=0:
                 raise Exception("Cannot start program - ongoing high-level task: " + task)
         self.current_task = program
         self.task_create(program, args, kwargs)