Re: [Help-glpk] [Fwd: jar files and libglpk.so]

[Heinrich Schuchardt]

Dear Mr. Campos,

the error you see indicates that some old version of the GLPK for Java 
or the GLPK library was loaded which does not contain method new_glp_cpxcp.

Could it be that at some time you installed an elder version of GLPK 
e.g. by calling
sudo apt-get install libglpk-java
and removed the *.so files you compiled from /usr/local/lib?

If you want to load
libglpk-java.so
from a nonstandard location you have to indicate this location by 
setting java.library.path or LD_LIBRARY_PATH.
See http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

If you want to load
libglpk.so from a nonstandard location you either have to set 
LD_LIBRARY_PATH or use
./configure --enable-libpath
and afterwards use java.library.path to indicate the path to search.

You can find a screenshot at
http://en.wikibooks.org/wiki/GLPK/Java#Usage_with_Eclipse
which shows how to set java.library.path in an Eclipse project (project 
property "Native library location").

Best regards

Heinrich Schuchardt

On 14.06.2014 20:18, João Campos wrote:
> Dear Mr. Heinrich Schuchardt:
> It is true that I have the .so files and the .jar files.
> Right now I have a little program written in Java in eclipse so I can read a 
> model in a file. I have added the .jar file to my BuildPath in eclipse.
> I also have copied the .so files to my workspace. This may seem a bit naive, 
> but it worked when I had to include other programs in my eclipse projects.
>   The error I get is:
> Exception in thread "main" java.lang.UnsatisfiedLinkError: 
> org.gnu.glpk.GLPKJNI.new_glp_cpxcp()J      at org.gnu.glpk.GLPKJNI.new_glp_cpxcp(Native Method) 
>    at org.gnu.glpk.glp_cpxcp.<init>(glp_cpxcp.java:48)       at Main.main(Main.java:9)
> I am using this operating system: Ubuntu 12.04.4 LTS.
> The installation instructions followed are contained in the following 
> link:http://glpk-java.sourceforge.net/gettingStarted.html
> More precisely:
> GLPKDownload the current version of GLPK source withwget 
> ftp://ftp.gnu.org/gnu/glpk/glpk-4.54.tar.gzUnzip the archive with:tar -xzf 
> glpk-4.54.tar.gz
> cd glpk-4.54Configure with:./configureMake and install with:make
> make check
> sudo make install
> sudo ldconfig
> and
> GLPK for JavaDownload GLPK for Java from 
> https://sourceforge.net/projects/glpk-java/files/.Unzip the archive with:tar 
> -xzf glpk-java-1.0.36.tar.gz
> cd glpk-java-1.0.36Configure with:./configureMake and install with:make
> make check
> sudo make install
> sudo ldconfig
> Thank you for your help.
> Yours sincerely,
> João Campos