Quote from http://www.ra.cs.uni-tuebingen.de/software/JavaNNS/welcome_e.html:

    "JavaNNS and SNNS are now very outdated and are no longer supported or maintained. Better use a modern neural network simulator, like Google Tensorflow 2.0 or Facebook's PyTorch 1.5, which also have very good online tutorials and support GPUs."

Please note this siftware is not maintained by me, and never was, it's not my software, it was made available for free by the University of Stuttgart and the University of Tübingen. It is not apparently available for download any more (the link at http://www.ra.cs.uni-tuebingen.de/software/JavaNNS/welcome_e.html is dysfunctional, and it has never been available from any RCS that I know of, which is why I checked it in here for my own purposes, a very long time ago).

I cannot however provide any help or support I'm afraid... very sorry... I've not even used it myself for 10Y or so.


**********************************************************************
			 SNNSv4.2 Readme file
**********************************************************************

The SNNSv4.2 directory consists of the following files: 

(Executable files  are  marked with a '*'  suffix,  directories with a
'/',  symbolic  links with a '@' in this Readme file. These characters
are not part of the filenames).

ENZO/                   hookup place for generic algorithm tool ENZO.
			The tool itself has to be retrieved and unpacked 
			seperately. 
Readme			this file Readme
Readme.bugs		A list of know problems
Readme.dec		Readme file with dec notes
Readme.getSNNS		Readme file how to obtain SNNS
Readme.install		Readme file how to install SNNS
Readme.license		Readme file of the SNNS license
Readme.linux		Readme file with linux notes
Readme.openwin		Readme file with open-windows notes

build*			shell script to build SNNS
			(must be invoked after 'configure')

cleanup*		shell script to clean up the SNNS directories
			from old executable and temporary files.

configuration/		configuration directory (used by 'configure').

configure*		shell script to create the proper SNNS 
			Makefiles (must be called before 'build').

default.cfg		Default SNNS window configuration file.

examples/		examples directory (SNNS network, pattern
			and configuration files).

help.hdoc		English help documentation for context
			sensitive help from within SNNS. This ASCII 
			file can be also be used as a primitive user 
			manual if you cannot print the PostScript manual
			or obtain the written documentation.

kernel/			SNNS simulator kernel directory.

tools/                  directory with some useful tools and demos to help 
			with the usage of SNNS.
 
userman/		hookup place for SNNS user manual LaTeX sources 
			directory. The manual itself has to be retrieved 
			and unpacked seperately.

xgui/			SNNS simulator X window graphical user
			interface directory

**********************************************************************
		     End of SNNSv4.2 Readme file
**********************************************************************