clean the buffer

[Jav]

I want to clean my buffer after each command that I send to my device....
I sent before this message the following message:

I create a modbus driver ascii, and I´m communicating with a device, but it responds sometimes.... when I push the key RUN of Labview the device not respond and I have to stop.. but the second time the instriment respond perfectly... the instrument responds each two time....
I believe that the problem is because I use bytes at serial port immediately read serial port. In probe mode in labview (RUN) in read serial port the instrument stop... the second time it respond... I use this bytes at serial port and read serial port for clean the buffer...what can I do?"

Somebody responds with it isa problem of flush buffer, but I d
on´t know what parameters I must enter...

[JRA]

Here is something you could try. At the beginning of your VI, read one byte at a time until it is empty. Have a timeout on the read VI with a small time and then check to see, each time, if you read a byte. If not, you know it is empty.