Re: Problems running ImageJ on 64x WinXP with max mem set to 6 GB

Posted by Michael Schell on Jun 02, 2008; 6:02pm
URL: http://imagej.273.s1.nabble.com/Problems-running-ImageJ-on-64x-WinXP-with-max-mem-set-to-6-GB-tp3696088p3696092.html

Hi Shawn,

The problem has  something to do with where ImageJ looks for the  
virtual machine.  I am not a Java expert, so somebody else in the is  
group may be able to explain this better or provide a more elegant  
solution.    However, I got this to work with Tony Collins' MBF-
ImageJ bundle by using the following protocol, and now my RAM  
limitation is eliminated.

1.  Go to this website and download JDK 6 Update 2, the first one on  
the list (this may not be the current version; I did this last autumn).

http://java.sun.com/javase/downloads/index.jsp

2.  After you click the download button, you will get some choices  
for which version.  Click the accept button, then scroll down to the  
last choice, which is:

Windows x64 Platform - Java(TM) SE Development Kit 6 Update 2

3.  After it downloads, install it where the installer defaults:  C:/
programs/Java

4.  Open the MBF-ImageJ folder and discard the Imagej.cfg file and  
also discard the /jre folder.

5.  Also, for some unknown reason, MBF-ImageJ installs a *second* /
jre folder in /programs(x86) [not the same folder as /programs].  
Discard this /jre folder too!

6.  Try to launch ImageJ.  It will freak out and tell you that it  
cannot find a /jre folder

7.  Re-direct it to the new version of Java you just installed,  
i.e.,  dig down through C:\Programs\Java\jdk1.6.0_01\jre\bin\javaw.exe

8.  Select javaw.exe

Now ImageJ will launch and you can assign up to 66% of the total  
RAM.  For my 8 GB system, I have assigned 5 GB

Good luck!

Mike

On Jun 2, 2008, at 1:38 PM, Shawn Mikula wrote:

> hello ImageJ community,
> this email may be better addressed to a Java mailing list, but  
> hopefully someone here can help me out...  To use ImageJ with  
> images of several GB's in size, I have tried installing the 64x JRE  
> (v1.6) on a 64x WinXP system with 16 GB RAM, but when I use ImageJ  
> with Xmx option set to 6 GB, I am receiving a "Could not create the  
> Java virtual machine" error and early termination of ImageJ.  Has  
> anyone used ImageJ on 64x WinXP systems successfully using multi-GB  
> size images?  Does anyone have any ideas why Java is not able to  
> create the Java virtual machine?
> thanks.
> Shawn
>
>
>
> --
> Shawn Mikula, Ph.D.,
> Center for Neuroscience
> University of California-Davis,
> 1544 Newton Court,
> Davis, CA 95618,
> Phone: [phone]
> Fax: [phone]
> mail: [hidden email]
> web: http://brainmaps.org

Michael J. Schell, Ph.D., CIV, USUHS
Assist. Professor
Dept. of Pharmacology
Uniformed Services University
4301 Jones Bridge Rd.
Bethesda, MD  20814-3220
tel:  [phone]
[hidden email]