I am attempting to use the intermediate AI vis to receive a 50kHz sinusodial pulse. I am getting the error 10609, saying a transfer is already in progress for specified resource, could anyone help me out with this error?

[JrodMillar]

these intermediate vis are part of a sequence, where in the first step of the sequence a pulse is generated, and the second part the sequence the pulse is received. its a sonar system, the error occurs at teh read function, could this have something to do with the buffer?

[Ben]

Post you code and we can help better.

Without looking I have to ask if you are setting up seperate task ID's for the two I/O operations.

That message indicates something is still happening from a previous request.

Does this happen on the first attempt after re-booting?

Done guessing (ther would be no end),

Ben

[Filipe A.]

Hello;

It's looking like you are not doing the double buffer aquisition properly. Since you didin't post the VI I can't tell exactly what could be changed, but I strongly suggest you to start the acquisition VI with the Labview shipping example named "Continuous Acquisition and Chart (buffered).VI" that can be found at Search Examples->I/O Interfaces->Data Acquisition->Analog Input->Continuous Analog Input.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments