I often get transfer errors -10608 and -10803 when doing double buffered analog output. How can I fix this?

[roz]

I'm using the PCI 6711 board programmed in Visual Basic. I'm working from the WFMDoubleBuf example file for VB and I've modified it for continuous output on 2 analog channels. I fill the buffers with customized waveforms from files I have previously created. I often get -10608 (noTransferInProgError, No transfer is in progress for the specified resource) and -10803 (transferStoppedError   , The on-going transfer has been stopped. This is to prevent regeneration for output operations, or to reallocate resources for input operations) errors when I try to output at higher rates (about 140000samples per second and up). The -10608 error generally happens after seve
ral (sometimes hundreds) of half buffers have been transfered, whereas the -10803 error usually occurs immediately after starting output. This device is supposed to be able to output at up to 1Msample per sec per channel but I don't seem to be able to do that. I have tried increasing the buffersize (up to 16777216) with no apparent effect. Is there any other information as to what causes these errors or how they can be avoided. Any ideas?

[Sarah Thompson]

Roz,
I found two KnowledgeBase entries about the most common causes of these errors.

1. Why Do I Receive the Error -10608 When Using the PCI-6711?: http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/37752a79eb6a950886256c8b006e8870?OpenDocument

2. Why am I Getting the 10800 and/or 10803 Errors?:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/c9097c72463d215886256a700075a6ef?OpenDocument

Have a great day.