Oracle SQL Developer - Unable to create an instance of the Java Virtual Machine

http://www.faisalmb.com/blog/post/2009/06/23/Oracle-SQL-Developer-Unable-to-create-an-instance-of-the-Java-Virtual-Machine.aspx

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Oracle SQL Developer
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Unable to create an instance of the Java Virtual Machine
Located at path:
<SQLDEVELOPER>\jdk\jre\bin\client\jvm.dll
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OK  
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Resolution for this error which works for me, as follow :-

Open ide.conf file from

<SQLDEVELOPER>/jdev/bin/ide.conf
or
<SQLDEVELOPER>\ide\bin\ide.conf


In this file, change this line :
AddVMOption -Xmx512M

by

AddVMOption -Xmx256M

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