The data argument must contain one column for each output channel in the session

I'm having trouble understanding what I'm doing wrong that results in this error. It seems like a bug. I've attached a minimum working example below:

>> instrreset; clear all;
>> ao0 = daq.createSession('ni');
>> ao0chan = addAnalogOutputChannel(ao0,'Dev1',0,'Voltage');
Warning: A channel that does not support clocked sampling was added to the session. Clocked operations using
startForeground and startBackground will be disabled. Only on-demand operations using inputSingleScan and
outputSingleScan can be done. 
>> dio = daq.createSession('ni');
>> addDigitalChannel(dio,'Dev1','Port0/Line0:7','OutputOnly');
Warning: A channel that does not support clocked sampling was added to the session. Clocked operations using
startForeground and startBackground will be disabled. Only on-demand operations using inputSingleScan and
outputSingleScan can be done. 
>> addDigitalChannel(dio,'Dev1','Port1/Line0:3','OutputOnly');
>> outputSingleScan(dio,[0 0 0 0 0 0 0 0 0 0 0 0])
>> outputSingleScan(dio,[0 0 0 0 0 0 1 0 0 0 0 0])
>> outputSingleScanoutputSingleScan(ao0,1)
>> outputSingleScan(dio,[0 0 0 0 0 0 0 0 0 0 0 0])
The data argument must contain one column for each output channel in the session.
 
>> dio

dio = 

Data acquisition session using National Instruments hardware:
   Clocked operations using startForeground and startBackground are disabled.
   Only on-demand operations using inputSingleScan and outputSingleScan can be done.
   Number of channels: 12
      index Type Device   Channel   MeasurementType Range Name
      ----- ---- ------ ----------- --------------- ----- ----
      1     dio  Dev1   port0/line0 OutputOnly      n/a
      2     dio  Dev1   port0/line1 OutputOnly      n/a
      3     dio  Dev1   port0/line2 OutputOnly      n/a
      4     dio  Dev1   port0/line3 OutputOnly      n/a
      5     dio  Dev1   port0/line4 OutputOnly      n/a
      6     dio  Dev1   port0/line5 OutputOnly      n/a
      7     dio  Dev1   port0/line6 OutputOnly      n/a
      8     dio  Dev1   port0/line7 OutputOnly      n/a
      9     dio  Dev1   port1/line0 OutputOnly      n/a
      10    dio  Dev1   port1/line1 OutputOnly      n/a
      11    dio  Dev1   port1/line2 OutputOnly      n/a
      12    dio  Dev1   port1/line3 OutputOnly      n/a
   
Properties, Methods, Events

>> ao0

ao0 = 

Data acquisition session using National Instruments hardware:
   Clocked operations using startForeground and startBackground are disabled.
   Only on-demand operations using inputSingleScan and outputSingleScan can be done.
   Number of channels: 1
      index Type Device Channel   MeasurementType        Range      Name
      ----- ---- ------ ------- ------------------- --------------- ----
      1     ao   Dev1   ao0     Voltage (SingleEnd) 0 to +5.0 Volts
   
Properties, Methods, Events

>> 

I'm using a NIST NI USB-6009 DAQ, if it helps.

[Walter Roberson]

Your copy/paste shows

 outputSingleScanoutputSingleScan(ao0,1)

which would appear to be a typo, but we cannot be certain what you wrote.

If you were to put in a time delay after the output to ao0, then does the problem occur even without the output to dio0 ?

If you were to output multiple items to ao0 then is it the case that the error does not happen until the first time you try to output to dio0 after you output to ao0 ?

What would happen if you were to give 13 values in the output to dio0 at that point?

[Christopher Stanford]

Yes that was a typo.

The answers to your 3 questions are:

1. No, it only occurs with a dio output following an analog output
2. Correct
3. Same error

Thanks for helping with this!

[Christopher Stanford]

Some more weirdness. If I clear dio and restart it, it works again, but it breaks ao0 as soon as I write to dio. Then if I clear ao0 and restart ao0, it will break dio again as soon as I write to ao0. Here's some code, continuing from the point in the OP:

>> outputSingleScan(dio,[0 0 0 0 0 0 0 0 0 0 0 0])
The data argument must contain one column for each output channel in the session.
 
>> clear dio
>> dio = daq.createSession('ni');
>> addDigitalChannel(dio,'Dev1','Port0/Line0:7','OutputOnly');
Warning: A channel that does not support clocked sampling was added to the session. Clocked operations using
startForeground and startBackground will be disabled. Only on-demand operations using inputSingleScan and
outputSingleScan can be done. 
>> addDigitalChannel(dio,'Dev1','Port1/Line0:3','OutputOnly');
>> outputSingleScan(ao0,1)
>> outputSingleScan(dio,[0 0 0 0 0 0 1 0 0 0 0 0])
>> outputSingleScan(ao0,1)
The data argument must contain one column for each output channel in the session.
 
>> clear ao0
>> ao0 = daq.createSession('ni');
>> ao0chan = addAnalogOutputChannel(ao0,'Dev1',0,'Voltage');
Warning: A channel that does not support clocked sampling was added to the session. Clocked operations using
startForeground and startBackground will be disabled. Only on-demand operations using inputSingleScan and
outputSingleScan can be done. 
>> outputSingleScan(dio,[0 0 0 0 0 0 1 0 0 0 0 0])
>> outputSingleScan(ao0,1)
>> outputSingleScan(dio,[0 0 0 0 0 0 1 0 0 0 0 0])
The data argument must contain one column for each output channel in the session.
 
>> 

[Walter Roberson]

I have been wondering what would happen if you were to try to write as many elements as were appropriate for the other device set -- so when it is complaining about columns for ao0, would it complain if you tried to send to ao0 12 samples ?