Error in connecting AMPL to MATLAB

[mahraz amini]

Hi AMPL group

I already connected the AMPL to MATLAB 2016 and MATLAB 2014 and now I am trying to do the same on MATLAB 2012 but I am facing some errors.

When I write setupOnce, the output is same as before. but after that when I write AMPL , I get this error :

Java exception occurred:

java.lang.NoSuchMethodError: com.sun.jna.IntegerType.<init>(IJZ)V

at com.sun.jna.platform.win32.WinDef$DWORD.<init>(WinDef.java:102)

at com.sun.jna.platform.win32.WinDef$DWORD.<init>(WinDef.java:92)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at

    com.sun.jna.NativeMappedConverter.defaultValue(NativeMappedConverter.java:47)

at com.sun.jna.NativeMappedConverter.<init>(NativeMappedConverter.java:41)

at

    com.sun.jna.NativeMappedConverter.getInstance(NativeMappedConverter.java:29)

at com.sun.jna.Structure.calculateSize(Structure.java:803)

at com.sun.jna.Structure.allocateMemory(Structure.java:287)

at com.sun.jna.Structure.<init>(Structure.java:177)

at com.sun.jna.Structure.<init>(Structure.java:167)

at com.sun.jna.Structure.<init>(Structure.java:163)

at com.sun.jna.Structure.<init>(Structure.java:154)

at

    com.sun.jna.platform.win32.WinBase$SECURITY_ATTRIBUTES.<init>(WinBase.java:593)

    

at com.ampl.AMPLSigSend.initializeSWPipe(AMPLSigSend.java:41)

at com.ampl.WindowsAMPLProcess.<init>(AMPLProcess.java:744)

at com.ampl.AMPLProcess.create(AMPLProcess.java:396)

at com.ampl.Engine.<init>(Engine.java:49)

at com.ampl.AMPL.<init>(AMPL.java:190)

at com.ampl.AMPL.<init>(AMPL.java:158)

Error in AMPL (line 41)

                    a = com.ampl.AMPL();

When I write setupOnce, the output is same as before. but after that when I write AMPL , I get this error :

Can you please help me understand what is the problem and how I can fix it?

My MATLAB is 32 bit, my windows is 64 bit , and I got same error while trying both 32 bits and 64 bits AMPL.

Thanks,

Mahraz

[Filipe Brandão]

Hi Mahraz,

The MATLAB API was implemented on top of the Java API which requires Java 1.7. Are you using an older Java version?

Best regards,
Filipe