MATLAB: Program works in 2008 but not in 2012

java exception

I write a program to control Ocean optics spectrum analyzer through usb.
OmniDriverJarFilePath = 'C:\Program Files\Ocean Optics\OmniDriver 
                            \OOI_HOME\OmniDriver.jar';
OmniDriverJavaClass = 'com.oceanoptics.omnidriver.api.wrapper.Wrapper';
spectrometerIndex = 0;
MatlabJavaClassPath = javaclasspath;
if(isempty(MatlabJavaClassPath))
    javaaddpath(OmniDriverJarFilePath);
end
import(OmniDriverJavaClass);
clear wrapper
wrapper = Wrapper();    % used when called by a function
numoospec = wrapper.openAllSpectrometers();
It works well in m Matlab 2008, however, when I try to run it in Matlab 2012, it show error at the last command.
    Java exception occurred:
      java.lang.UnsatisfiedLinkError:
    com.oceanoptics.uniusb.UniUSB.NatUSBGetInterfaceDescriptor(JLcom/oceanoptics
    /uniusb/USBInterfaceDescriptor;)V
        at com.oceanoptics.uniusb.UniUSB.NatUSBGetInterfaceDescriptor(Native Method)
        at com.oceanoptics.uniusb.UniUSB.openDevice(UniUSB.java:106)
Does anybody know what's going on? Thanks a lot.

Best Answer

Hi,
seems like a DLL cant be found from the JAVA code. I guess you modified the librarypath.txt in 2008 in order to add the folder where the needed DLL is located. Did you do that on 2012 also? You can type
   edit librarypath.txt
in MATLAB to open that file. Compare that to the 2008.
Alternativly, did the bittedness changed? In the case you moved from 32bit 2008 to 64bit 2012 you need to make sure to get the needed DLL as 64bit DLL.
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