Re: null pointer exception on instanciating a matlab .jar class from plugin

Posted by Heerpa on Jul 06, 2011; 8:17pm
URL: http://imagej.273.s1.nabble.com/null-pointer-exception-on-instanciating-a-matlab-jar-class-from-plugin-tp3683949p3683956.html

> Hi,
>
> it is slightly irritating that you neither quote my mail nor send the
> answer Cc:ed to me.
>
right, sorry - I am still learning..

> On Wed, 6 Jul 2011, Heerpa wrote:
>
>> Hum, I have not run "update menus" (I didn't know about it, so I
>> always update the menus by restarting IJ).
>> Might the problem be that I built the file before so that java
>> somewhere keeps nativemcl76.dll loaded which causes a problem the
>> next time?
>> But then, the first try this morning went wrong, too..
>>
>> Is it possible that I implicitely load the dll twice in the plugin?
>
> Must be that.
>
> I fear that you need to use either Matlab's Compiler (not Compiler  
> JA) or
> Coder Toolbox instead, since I doubt that you can somehow control  
> how the
> Matlab Runtime tries to load the classes when built with Compiler JA.
>

up to now, I was under the impression that matlab compiler, and  
compiler JA / builder JA was the same.. well I used the tool you get  
with typing deploytool.
using the mcc command, you do not get java files, do you?
http://www.mathworks.com/help/toolbox/compiler/bsl9d99.html


> At least that's what a colleague and me did (work stalled a little, we
> wanted to publish an application note about this before offering  
> our work
> to others).
I totally understand - well I am grateful for as much help as you are  
prepared to give.

Cheers,
    Heinrich