200560 timeout error using DAQmx

Question

I had 2 separate DAQmx tasks working concurrently on the same block diagram.  The two tasks were not triggered, but both were starting at roughly the same time, give or take a few samples.
Next, I wanted to clean up my work and make 2 separate sub VI's from the 2 tasks on my block diagram.  So I coppied on block of code to a new VI and deleted that block of code from the original block diagram.  Now, the task onr the original block diagram gets error 200560 when I try to run it.  Specifically, the error message reads: "200560 occurred at DAQmx Wait Until Done.vi.  Possible reason - Measurements: Wait Until Done did not indicate that the task was done within the specified timeout".  The timeout was set for 10s.
I replaced the block of code for the task that was moved and everything ran fine as before. 
When I single-stepped through the code, I noticed that the second task started before the first task was done.  This led me to suspect some sort of timing issue.  I tried to induce a wait state by inserting a for loop with a 500 ms delay, but it did no good.
Any ideas?

Answer 1

For my application, I'm trying to energize a solenoid coil with a 12V pulse, while at the same time, making an acceleration measurement.  I'm generating the 12V pulse with the 9472 in slot 4 of the compact daq chassis.  I'm making the acceleration measurement with the 9233 in slot 1. 
If you look at the attached VI, write pulse with internal counter_12_11_08.vi, you will see code for the pulse generation at the top of the block diagram and code for the acceleration measurement at the bottem.  If I delete the code for the acceleration measurement, the code for the pulse generation hangs up.
Attachments:
write pulse with internal counter_12_11_08.vi ‏33 KB
Build Pulse Array.vi ‏19 KB