I suggest you post your VI and give some more details about what kind of system you have (the instrument on the other side), what you expect to get and what you actually get.
Are you using Bytes At Port to get the number of bytes to read? If not, you could be reading just part of what is there. Here is an example that I recently posted on using the serial port.
Is the Read function set to terminate on a Termination Character? Your example suggests that tha data stream may contain any character. If read is set to terminate on Carriage Return (0D) and that byte shows up in your data, the read will end. Use no termination character and read the number of bytes available at the port as tbob suggests.
As I mentioned above the VISA Configure Serial Port defaults to terminating read on a character, \n = 0xA. Here is an excerpt from the help file:
"termination char calls for termination of the read operation. The read operation terminates when the termination char is read from the serial device. 0xA is the hex equivalent of a linefeed character (\n). Change the termination char to 0xD for message strings that terminate with a carriage return (\r)."
If your data stream can contain the character 0xA, the read will terminate when that charater is received. If all 256 possible bytes may occur in your data, wire a False constant to the Enable Termination Char (T) input of the VISA Configure Serial Port VI.
