[Resolved] Unable to create an instance of the Java Virtual Machine error

11 Comments

• Hi Hossam
  
  Thanks for your Solution, but i would like to tell you that it did not work.
  
  The problem with Internet Explorer 7
  
  cause Latest version of SqlDeveloper already have Xmx512M
  
  So Uninstall the Explorer then Restart and Install
  
  Thanks
  

• Thanks Sami for this tip , i think it's a version problem I'm using this version 1.1.2.25.79 , are you speaking about another one ?
  

• Thank for your solution.It help me a lot
  

• thanks a lot
  it works
  

• Hello,
  
  I had the same problem after upgrading to IE8. I set the Xmx to 256M instead of 512M, now it works.
  
  Thanks for the tip.
  

• I have the same problem,but with the JDeveloper IDE, I can't find the path as you specified in Oracle SQL Developer, how should I do?
  
  

• Locate line "AddVMOption -XX:MaxPermSize=256M".
  
  Now add another line just below this line:
  
  AddVMOption -Xmx256M
  
  edit file jdef.conf
  
  It work!
  

• so, thanks
  
  
  # re: [Resolved] Unable to create an instance of the Java Virtual Machine error
  Thursday, December 17, 2009 3:23 AM by Tchezan
  In order to fix this type of error, go to installation_directoy\Middleware\JDeveloper\jdev\bin folder
  
  and edit file jdev.conf.
  
  Locate line "AddVMOption -XX:MaxPermSize=256M".
  
  Now add another line just below this line:
  
  AddVMOption -Xmx256M
  
  I found this solution at : javainnovations.blogspot.com/.../jdeveloper11g-startup-error.html
  
  It work for me.
  

• The solution from Tchezan worked on new install of JDeveloper 10g 10.1.3 running on XP, though the initial "AddVMOption..." read
  
  "AddVMOption -XX:MaxPermSize=160M"
  
  and I commented out the initial setting
  
  "AddVMOption -Xmx512M"
  
  Now it opens. Thanks.
  
  (BTW: how lame is this that a fresh install of such a *professional* piece of software on a blank OS requires a config edit sourced from a user blog...???)
  

• Ho risolto abbassando il valore come da consiglio.
  Il file ide.conf però risiede nella cartella ide\bin
  

• I used the Oracle SQL Developer and has the same problem. Then I changed the ide.conf file located under <Oracle SQL eveloper>ide\bin\.
  
  follow the below steps:
  
  1. open the file ide.conf located under <Oracle SQL eveloper>ide\bin\
  
  2. located line "AddVMOption -XX:MaxPermSize=640M".
  
  3. changed to "AddVMOption -XX:MaxPermSize=256M".
  
  4. done.
  
  and the Oracle SQL Developer works.
  
  thanks Hossam.