simtk.org

When I start the program Opensom, I get the error:

"A java.lang.NullPointerException exception has occurred.
Click Show Details or see the messages.log file located in your C:\Users\Wimzie\AppData\Roaming\.opensim\1.9.1\var\log folder."

When I start the programma Opensim by opening a OSIM file, I get another error:


"Cannot find java.exe in jdk\..."

I can't open Opensim, it always generates an error. I have reinstalled it twice and it still doens't work. My computer works with Windows 7.
Can someone please help me?

Hi Wim,

Please follow the instructions on the thread
https://simtk.org/forum/message.php?msg_id=2723

and let us know if you continue to have problems.

Best of luck,
-Ayman

Ayman,

I downloaded the java update mentioned in the other topic. Then I wanted to proceed with step 2:

"2) edit the opensim.conf file under your installation to use this jre (above e.g. location
jdkhome="C:\Program Files\Java\jre6")."

I have no idea what you mean by this. Can you explain to my in detail what I have to do? (I found the opensim.conf file but I don't understand what I have to do with it)

Thx

Wim

When you open your opensim.conf file using a text editor like notepad, you should have a couple lines in it that say something like this:

# default location of JDK/JRE, can be overridden by using --jdkhome <dir> switch
jdkhome="jdk"


I think he is saying to change it so it says this:

# default location of JDK/JRE, can be overridden by using --jdkhome <dir> switch
jdkhome="C:\Program Files\Java\jre6"

Chris Zirker

Thanks Chris, that's exactly what the instructions meant, assuming that when you downloaded the JRE for Windows7, you installed it under "C:\Program Files\Java\jre6". If not please use the full path to the directory you used instead.

Best,
-Ayman

Thx a lot! It worked but now I have the same problem as the other guy see
" https://simtk.org/forum/message.php?msg_id=2740 "

So here is my next stupid question:
How do I unistall the JDK (I can't find it in my programs) and where can I find the 32 bit version (I looked on the java download site but I can't find it or I looked over it)

Thx!

Wim

Wim,

For uninstall, you need to find the equivalent of the Add/Remove Programs from ControlPanel, select the version you want removed and click remove or uninstall.

For installing the correct version, just go to the standard download place for Java
http://java.sun.com/javase/downloads/index.jsp
and use Windows instead of Windows 64.

Please let me know how that goes,
-Ayman

Thx alot! It workes!!

Hi! I'm having the same error problems. I'd already downloaded the JRE6 update 20 and followed the win7 instructions, but nothing seems to work. How should I proceed?

I'd the same error problems the guys already related.

thanks support team

Hi Giovanni,

I got the same problem.
(You find the solution in the following thread https://simtk.org/tracker/index.php?fun ... 1&atid=322)

The registry (JavaSoft etc.) was still the same if I install the new Java-Update or OpenSim again.

So I just delete two things:

1. the folder .opensim (somewhere under your C:Documents and
Settings$your_user_name)
2. Entries in the registry regarding your preferences.
KEY_CURRENT_USER/Software/JavaSoft/Prefs/org/opensim

If I remove both OpenSim works correctly.