Error 56 on IRDA read

Im trying to do an IDRA communication via a USB IRDA device through LabVIEW (8.6) to an external device.
I know communications can be established because the IRDA comms works in a C based program using the same device and driver.
When I do get Comms, I get extra bytes back that I do not see in the C based program.
The whole of yesterday afternoon I was getting failed Comms and not reading any data back from the device at all.
I started off getting error 56 appearing infrequently, but it appeared to increase in frequency rate throughout the afternoon and I now can't run the code without getting it.
Any ideas for where I should even start looking please?
Cheers James

Hi James
Can I ask what kind of device you are using to send the Infra red. I think that error 56 may be comming form the device itself and previously I have found this means that The network BIOS command limit has been reached. This would explain why it is coming at a variation of times. If the error is being genorated directly from the PC then it may be a timing issue.
Where is the error generated from, can you define more accuratly when it is occuring. which VI for example.
best regards
Graham Green
Technical Marketing Engineer
National instruments UK & Ireland

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