8176 AND 6 6071e shared trigger losing proc cycles

[B-man]

I have an 8176 running 6 6071e DAQ cards in a PXI chassis. Using Labview 5.1, Windows 2000 and NIDAQ 6.9.2. The cards are time synched using the RTSI line, and I added an occurrence to free up the processor in order to send some other commands to the chassis. My problem is that the processor usage starts at 6%, but slowly creeps up to 100% (in hours) as viewed from task manager. Any processor time grabs, like minimizing the diagram window or moving the scroll bars on the diagram window, bump up the processor usage dramatically, as expected, but the usage does not recover, causing 100% usage in a very short time. At first I thought the VISA interface to some instruments was the culprit, but running nothing but the
DAQ vi showed the same effect. I am attaching the DAQ vi, which uses channel names, but can be easily modified to use channel numbers and device numbers. Any clues? I am running out of time.

[Ben]

I beleive you are seeing a variation on what we discussed here;

http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=506500000008000000588A0000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0

Short version;
Your code is falling behind occurrences and never catches up.

Ben