Caught unexpected exception of unknown type TCP/IP device connection

Hi, I'm trying to connect a Newport XPS motion controller to Matlab via TCP/IP. I'm running 64bit 2012b on win7 64bit. The code is:

   loadlibrary('XPS_C8_drivers.dll','xps_load_drivers.h')

% Set connection parameters
IP = '192.168.0.254' ;
Port = 5001;
TimeOut = 10.0 ;
% Connect to XPS
socketID = TCP_ConnectToServer (IP, Port, TimeOut) ;
% Check connection
if (socketID < 0)
disp 'Connection to XPS failed, check IP & Port' ;
return ;
end

% Define the positioner
group = 'GROUP2' ;
positioner = 'GROUP2.POSITIONER' ;
% Kill the group
[errorCode] = GroupKill(socketID, group) ;
if (errorCode ~= 0)
disp (['Error ' num2str(errorCode) 'occurred while doing GroupKill ! ']) ;
return ;
end

% Initialize the group
[errorCode] = GroupInitialize(socketID, group) ;
if (errorCode ~= 0)
disp (['Error ' num2str(errorCode) ' occurred while doing GroupInitialize ! ']) ;
return ;
end
% Home search
[errorCode] = GroupHomeSearch(socketID, group) ;
if (errorCode ~= 0)
disp (['Error ' num2str(errorCode) ' occurred while doing GroupHomeSearch ! ']) ;
return ;
end
% Make a move
[errorCode] = GroupMoveAbsolute(socketID, positioner, 20.0) ;
if (errorCode ~= 0)
disp (['Error ' num2str(errorCode) ' occurred while doing GroupMoveAbsolute ! ']) ;
return ;
end
% Get current position
[errorCode, currentPosition] = GroupPositionCurrentGet(socketID, positioner, 1) ;
if (errorCode ~= 0)
disp (['Error ' num2str(errorCode) ' occurred while doing GroupPositionCurrentGet! ']) ;
return ;
else
disp (['Positioner ' positioner ' is in position ' num2str(currentPosition)]) ;
end
% Close connection
TCP_CloseSocket(socketID)

This script runs fine the first time, but if I try to execute it a second time, I get "Caught unexpected exception of unknown type". If I hover the mouse for the run button after the second attempt Matlab tells me that "Syntax Error: TestXPS cannot run as it appears". I need to restart the computer to run it again. I ran this on a 32bit matlab 2012b and it can be run multiple times in a row with no errors.

Anyone have an idea?

Thanks, Charles

[Feng]

I run into the same problem when I recently upgrade my computer to 64-bits. Did you find a solution for your problem? Thanks, Feng

[Andrés Aguilar]

I know this is really old but soemone might find this comment useful: the dll I downloaded from the ftp server on the XPS(Q8) is a 32bit dll. It got it to work on a 32 bit 2015a Matlab on Windows 10 64 bit.