NiDAQMX close all created tasks

Question

I would like to close all the previously created tasks in the nidaqmx-python module.

How can I do this?

In example, I have a number of previously opened tasks:

for i in range(10):
    nidaqmx.Task()

which I did not close. However, I want to close them now.

You probably want to save the return values of `.Task()` and then later call a method on that returned object. — , Mar 07 '18 at 15:05

score 2 · Answer 1 · answered Mar 07 '18 at 15:07

2

According to the source, you'll have to do something like the following:

tasks = []
for i in range(10):
    tasks.append(nidaqmx.Task())

# Some code ...

for task in tasks:
    task.close()

answered Mar 07 '18 at 15:07

I do not have the tasks saved in a list. Lets say the program crashed between measurements. – blaz Mar 07 '18 at 15:13
Are the task names fixed? IE could you attempt to clear the task on EXE start and handle the error? – shmicah Mar 07 '18 at 18:00

score 1 · Accepted Answer · answered Mar 08 '18 at 22:05

1

Have you tried using a reset_device() on the device you are using? It should make all tasks associated with the device able to be started again.

edit: though it cleared the tasks, but it only aborts them.

answered Mar 08 '18 at 22:05

berna1111

Just a remark: this is a last resort! You should keep a list of open tasks and close them, or use the structure `with nidaqmx.Task() as task:` to let the code handle open and close tasks. – berna1111 Mar 09 '18 at 21:14

2 Answers2