Not intelligib​le problems with the counter

I use
Board: PCI-6601
Soft: VB 5.0 and ComponentWorks 3.0
For my task I use " Buffered Event Counting" mode. If the signal comes the first on "Source" and then on "Gate" all works wonderfully. But if the signal comes on "Gate" the first I receive mistake
Error:-10920
Context: Reading data
Description: "One or more data points might have been lost during buffered GPCTR operations due to speed limitations of your system".
It is very strange. I would like to see zero. Somebody can face with this problem? Or the counter cannot work in such mode?
Thanks.

Pete;
I agree that is a little strange.We don't have such problem reported on our Data Bases.
A workaround you can try is to make a sinle pulse goes to the source, before start the buffered acquisition, and see if that makes the counter keeps reporting a 1 value.
You can also try the same thing on another counter of the board to see if that problem is related to the counter you are using.
Regards
Filipe A.
Applications Engineer
National Instruments

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