I have similar issue, but in my case, the matlab shows different message to me.
Do you have any suggestion for this problem?
(I used Patriot with serial port connection)
global Digitize
Digitize.SerialConnection
Serial Port Object : Serial-COM2
Communication Settings
Port: COM2
BaudRate: 115200
Terminator: 'CR'
Communication State
Status: open
RecordStatus: off
Read/Write State
TransferStatus: idle
BytesAvailable: 0
ValuesReceived: 0
ValuesSent: 8
fprintf(Digitize.SerialConnection,'%s','P')
fprintf(Digitize.SerialConnection,'%s','P')
Warning: A timeout occurred before the Terminator was
reached.
Error reading data point. Try again.
If the problem persits, reset the serial connnection.
PAP
Warning: A timeout occurred before the Terminator was
reached.
In instrcb at 48