Dear All
I have simple VI I am using to Transmit various different messages over a USB COM port (using FTDI chipset) to a device then carry out a subsequent RX.
Some messages do not result in a reply back from my device and in this case I do not experience a problem, however when I use a message (e.g. send a status request) that causes my device to give a reply I get the "Connection for the given session has been lost" error whilst attempting the RX.
My RX is achieved by using a using a VISA get property node to get the no. of received bytes and then feed this to a visa read. It seems the error occurs at the visa read. It seems inconsistent as occasionaly the error is not generated on the first TX & RX cycle, or during the first few.
Although I have read some similar posts on here concerning this there are a few gaps which I need to fill to help me resolve the problem. I am using LV 7.1 on winxp service pack 2.
1) How can I find out my version of VISA as i understand an out of date version could be the problem
2) I have tried the documented trick of using the VISA set I/O buffer size but am usure of what mask value should be used if it is failing on RX
Any help much appreciated.
