Modify programmaticaly a physical channel in a task

[Yves]

Hi,

I'm looking for a way to modify the physical channel of a task.

I already tried this but got an error...

Does anybody has an idea how to implement this correctly?

The goal is to have a preconfigured task with many channels where I can change some physical channels if needed.

Thanks for any help.
Yves

[pipipi0405]

Instead of PhysicalChanName property, did you try using Channels property?

[Yves]

Not yet. I'll try it tomorrow and give feedback.

Thanks for the idea.

Yves

[Yves]

Hi, 

I just tried your approach. 

Did you meant something like this?

If yes, then it didn't work.

[Kevin_Price]

This is not an authoritative answer, but I *suspect* it to be true:

A defined task is inextricably bound up with the physical channels it was configured to contain.  To change the physical channels involved in a task would require clearing the original task and configuring a new one with the new set of physical channels.

At least, I *think* so.

-Kevin P

[Yves · Accepted solution]

Hi,

Well, to be honest too, I talked to NI support. 

And after some checks they admitted that this can't be done programmaticaly. This function seems to be read-only even if it looks like it's possible.

I'd say this is a bug! Otherwise it should be documented clearly and obviously it is not. 

And come on, why shouldn't it be allowed.

But anyway. For my this case is closed and I resignate to build the daqmx-task everytime I need to change something.

Yves

[mcduff]

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@Kevin_Price wrote:

This is not an authoritative answer, but I *suspect* it to be true:

A defined task is inextricably bound up with the physical channels it was configured to contain.  To change the physical channels involved in a task would require clearing the original task and configuring a new one with the new set of physical channels.

At least, I *think* so.

-Kevin P

---

Just to chime in, and not an authoritative answer. I have added channels to an existing task without clearing it, etc. However, if I wanted to remove channels from an existing task, then I had to clear, configure a new one, etc.

mcduff