Unable to create an instance of the Java Virtual Machine error

For Sql developer, may face such error after updated operation system patch.

To Resolve this error please follow the below steps ;

1- Open the ide.conf file located under <Oracle SQL Developer>jdev\bin\

2- Edit :

    AddVMOption -Xmx1024M
    AddVMOption -Xmx256M or 512 MB change into 512 instead of 1024


JDeveloper11g Startup error
I installed JDeveloper11g Studio Edition with no JDK bundle but when i tried to start JDeveloper, it gave me error


Unable to start Java Virtual Machine located at ....


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