Execution of a CVI application using NI CAN is ~6 seconds faster if NI MAX is opened as well

Hi,
I am currently developing a CVI (7.0) application to download some software to a module via a Series 2 CAN card (NI CAN Driver 2.2f) and have noticed the following.
When running under the CVI debugger the CAN interface will sometimes respond with the error code -1074388991 receive timeout when I try to communicate with the module after the download process. In all cases the first of two CAN frames is received and the second is lost. If I start / open NI MAX and run the application, the error disappears. Increasing the timeout period does not cure the issue.
Furthermore if I compile the release executable and run it, the execution time is ~6 Seconds faster if NI MAX is open. When NI MAX is closed the execution time reverts to the original (longer) time. (This appears to be repeatable.)
The above error does not occur when running the release executable.
Does anyone know why NI MAX appears to have this affect on the CAN Interface ?
Aid

Hi,
The CAN error code -1074388991 description is as follows: The timeout of a wait or notification function expired before any desired state occured. Solutions: Increase value of Timeout parameter; Verify your cable connections and operations of remote devices. But you have already had a go at increasing the timeout parameter and that didn't work.
If you have NI-CAN 1.5, then you can use the Bus Monitor by configuring it up to CAN0 and hooking up a device to see if any frames are being read. The Bus Monitor logs all traffic on the bus. If you can communicate using the Bus Monitor, then your cables are set up properly. Make sure you close the Bus Monitor before running your program.
The follwoing discussion forum may offer some helpful advise:
http://forums.ni.com/ni/board/message?board.id=30&message.id=1011&requireLogin=False
I hope some of this helps!
Kind Regards,
Kurt

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