-10920 error when executing buffered period measurements on a PCI 6602 timer.

I frequently encounter the -10920 NI-DAQ error when I run the C code for single buffered data period measurement .
The error message is "One or more data points may have been lost during buffered period measurements due to speed limitations of the system". I am unable to resolve this error. I have a Win2K environment and am using VC++ to compile and execute the code. Please help.

When doing buffered period measurements, the rate at which you can transfer data from the counter is system dependant. To try to get around this there are two things you can try. The first is to set the 'number of counts to read at a time' to a greater number. This way, the 6602 board will use less calls across the PCI bus. If possible, try to limit the number of pulses coming in on the gate that you are using to latch the counts, though in many applications this is not possible.
Make sure that you minimize the PCI bus activity on your computer. This includes, video activity and any network activity along with anything else that is connected to the PCI bus.
Brian

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Error -200141 when doing buffered events with DAQmx and PCI-6602

When doing buffered events with DAQmx and PCI-6602 I get error 200141 - Data was overwritten before it could be read by the system.
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i'm getting the same Error-200141, while reading semiperiods. (Meas_Buffered semiperiod continous)
while loop ex.rate seems to be pulsewidth*no.Samples to read. in my case PW=60ms
Input buffer size measured with Property node= 10000
why this error happens?? i cant use any mode other than implicit timing for semi-period measurement right??
more info: all the ai channels are used ~ 16 differencial.
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Attachments:
Counter_1_Meas Buffered Semi-Period-Continuous_main_lv09.vi ‏34 KB
SemiPeriod_Reconnect Counter on Error.vi ‏35 KB

Doing Data acq. and buffered period measurement using counters simultaneously, gives an buffer overflow error

Iam doing Data acquisition using NI-PXI 4472 and buffered period Measurement using NI-PXI 6602 simultaneously,my program gives an buffer overflow error

murali_vml,
There are two common buffer overflow and overwrite errors.
Overflow error -10845 occurs when the NI-DAQ driver cannot read data from the DAQ device's FIFO buffer fast enough to keep up with the acquired data as it flows to the buffer (i.e., the FIFO buffer overflows before all the original data can be read from it). This is usually due to limitations of your computer system, most commonly the result of slow processor speeds (< 200 MHz) in conjunction with PCMCIA DAQ boards, which have small FIFO buffers (e.g., the DAQCard-500). Sometimes using a DAQCard with a larger FIFO can solve the problem, but a better solution is to lower the acquisition rate or move to a faster system. Another cause of the -10845 error could be due to an interrupt-driven
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Overwrite error -10846 occurs when the data in the software buffer that you created for an analog input operation gets overwritten by new data before you can retrieve the existing data from the buffer. This problem can be solved by adjusting the parameters of your data acquisition, such as the lowering the scan rate, increasing the buffer size, and/or increasing the number of scans to read from the buffer on each buffer read. Additionally, performing less processing in the loop can help avoid the -10846 error.
See the NI-DAQ Function Reference Manual for a listing of all NI-DAQ error codes.
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-10920 error when executing buffered period measurements on a PCI 6602 timer.

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