Error -200284, Behaviour in Execution Highlighting and Runtime Speed

Question

Hi
I am having trouble with the attached VI.
This VI reads a voltage on ai26 and it works fine if
1) the wait in the flat sequence is 2000 milliseconds or more and execution highlighting is turned off
or
2) the wait in the flat sequence is zero or more and execution highlighting is turned on.
LV reports error -200284 if I try executing 2) at runtime speed (execution highlighting turned off, wait=0). Is there a solution to change the VI in a way that the use of a wait is not necessary?
I already checked the LV examples and it seems that the examples (on my hardware) suffer the same problem.
Description of my task:
I need to sample the voltage at 2000 Samples/sec. Signal observation must be 5 sec, that makes 10000 Samples in the end. No trigger needed. The USB-6259 has a buffer of length 4095 but this is not my problem since I will be doing the acquisition (with 2000 sample chunks) in the producer- and the analysis in the consumer-loop.
My Hardware:
I am using USB-6259, LV 8.2 and DAQmx 8.6 on a Windows 2000 Machine.
Best regards
Thomas
Attachments:
Read Analog Wfm.vi ‏34 KB

Answer 1

In the attachment is the corrected VI without a wait.
If I run this corrected VI at runtime speed, I get error -200284.
If I place a breakpoint between the DAQmx Start and Read Task and run this VI (I will have to push the Continue-Button for the VI to finish), there will be no error.
Why that behaviour?
Thomas
Attachments:
Read Analog Wfm Correct.vi ‏32 KB