Error message -1073807298 when connecting through USB

Question

Hi,
 I am trying to retrive data from an instrument through serial port as well as USB,
 My vi works smoothly while connecting through serial port.
 But when i try to connect through USB Error code-1073807298
 is coming. This error comes when visa try to write to the instrument.
 From visa configure serial port.vi  no error is coming.
 Can someone suggest a method to solve this problem... 

Answer 1

I get exactly the same error code with a TCP raw socket connection, the weirdest thing is that I actually can read the result of the query. I fixed the problem reading one byte at a time but this is very inefficient (it uses a while loop) and I still get warnings, so I'd like to know if there is a way to fix this or if there is an equivalent of the "Serial Settings: Number of Bytes at Serial Port" for VISA TCP connections....
This is the WARNING that I get when I read one byte at a time:
Warning 1073676294 occurred at VISA Read in LV.vi
Possible reason(s):
VISA:  (Hex 0x3FFF0006) The number of bytes transferred is equal to the requested input count. More data might be available.
This is the ERROR  that I get when I set the byte count to 1024:
Error -1073807298 occurred at VISA Read in LV.vi
Possible reason(s):
VISA:  (Hex 0xBFFF003E) Could not perform operation because of I/O error.
I enclosed the VI for your review,
Thanx in advance for your help,
Attachments:
LV.vi ‏22 KB