Random Error -200559

[kjschmidt]

I've created a VI which uses 4 digital outpot port to control 4 LEDs and 1 analog input port to register signal from a photodiode. The code works most of the time, but sometimes this error message pops up. 

 

From what I observed there is no clear pattern for when this happens

Any suggestions? 

[GerdW]

Hi kj,

well, as the error message says: don't mix digital and analog channels in one task.

And it also says: don't mix input and output channels in one task!

You need, based on your description:

- one analog input task

- one digital output task

Additionally you could use

- digital input task(s)

- analog output task(s)

[kjschmidt]

Hi

Well that also how i set up my tasks. 

I have one task that handles 4 digital output port and one task that handles one analog input port. 

Both tasks are executed in the same while loop, but that shouldn't be a problem. 

[GerdW]

Hi kj,

Both tasks are executed in the same while loop, but that shouldn't be a problem. 

No, it shouldn't be a problem.

But as long as you don't show your VI we cannot really comment on it…

[kjschmidt]

Hi Gerdw,

Here are the VIs where the problem accours, hopes this can help

As said before, the error only accours "randomly" and not every time I run it. 

Best regards Karl-Johan 

[kjschmidt · Accepted solution]

I think I found the solution to the problem. (Since the error appeared ramdonly I'm not sure, but it hasn't appear since) 

Using "DAQmx Create Task.VI" and assigning them with a name before generating channels solved the problem.