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Serial Port: Device is communicating well with VISA-IC but not with VI...

Hi
 
I am trying to communicate with a device(Power Meter: ML2438A) using RS 232 serial port...
When I send a command using VISA-IC it worked fine.. but when I send the same command using a VI (Basic_serial_write_&_read.vi), it did nothing..   when I tried to read data it has thrown time out error.
 
I tried loopback test on the same VI it worked well..
 
Now the problem is Device is communicating well with VISA-IC but not with VI..
 
I am attaching NI-Spy results and specified VI.. Plz help me out
 
TIA
 
Bye
Brij.
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