Skip to content

Latest commit

 

History

History
37 lines (29 loc) · 1.47 KB

known_issues.md

File metadata and controls

37 lines (29 loc) · 1.47 KB
Raw

Known issues

Error when creating channels

On 28 April 2010, Jens Roesner received the following information:

I'm not sure why, but your code seemed to work fine for me until I tried any of the create channel commands. They all returned a -200088 error. I finally figured out a very slight tweak to your code that worked for me - not sure why the original didn't work.

I had to pass the initial task handle as empty - uint32([]). This is example code that worked for me:

taskhDO0 = [];
[err,b,taskhDO0] = calllib('myni', 'DAQmxCreateTask', 'DO0', uint32(taskhDO0))
[err,b,c,d] = calllib('myni', 'DAQmxCreateDOChan', taskhDO0, 'Dev1/port0/line0', '', DAQmx_Val_ChanPerLine)

I am using Matlab 7.8.0 (R2009a) on XP.

Issues reported by Nathan Tomlin

This description is included with Nathan Tomlin's code, last updated 14 May 2010:

Using Jens' code, I got an error -200088 whenever I tried to create a channel. To get it working, I had to change the initial task handles to uint32([]) which then returned a pointer for taskhandle.

I also had trouble with creating tasks, then losing the taskhandle, and not being able to create the same task because of a name conflict. The solution is to not name any of the tasks - names don't seem to be useful anyway. So all my functions pass an empty string as a name.