OutOfMemoryError on soapuipro startup

Hi

I am getting the below mentioned error on soapui startup.
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Unknown Source)
at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown Source)
at java.lang.AbstractStringBuilder.append(Unknown Source)
at java.lang.StringBuilder.append(Unknown Source)
at com.eviware.soapui.impl.support.loadsave.SplitProject.a(SourceFile:768)
at com.eviware.soapui.impl.support.loadsave.SplitProject.load(SourceFile:689)
at com.eviware.soapui.impl.support.wsdl.UrlWsdlLoaderPro.handleFile(SourceFile:42)
at com.eviware.soapui.impl.wsdl.support.wsdl.UrlWsdlLoader.load(UrlWsdlLoader.java:124)
at com.eviware.soapui.impl.wsdl.support.wsdl.UrlWsdlLoader.load(UrlWsdlLoader.java:98)
at com.eviware.soapui.impl.wsdl.WsdlProjectPro.loadProject(SourceFile:193)
at com.eviware.soapui.impl.wsdl.WsdlProject.<init>(WsdlProject.java:244)
at com.eviware.soapui.impl.wsdl.WsdlProjectPro.<init>(SourceFile:180)
at com.eviware.soapui.impl.wsdl.WsdlProjectProFactory.createNew(SourceFile:53)
at com.eviware.soapui.impl.wsdl.WsdlProjectProFactory.createNew(SourceFile:16)
at com.eviware.soapui.impl.WorkspaceImpl.loadWorkspace(WorkspaceImpl.java:175)
at com.eviware.soapui.impl.WorkspaceImpl.<init>(WorkspaceImpl.java:87)
at com.eviware.soapui.impl.WorkspaceFactoryImpl.openWorkspace(WorkspaceFactoryImpl.java:32)
at com.eviware.soapui.SoapUI.startSoapUI(SoapUI.java:812)
at com.eviware.soapui.SoapUIPro.a(SourceFile:222)
at com.eviware.soapui.SoapUIPro$SoapUIProRunner.run(SourceFile:1798)
at com.eviware.soapui.SoapUIPro.main(SourceFile:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)

I have edited the soapui-pro.bat file with Xms and Xmx parameters as 512 and 1526 respectively.
Do let me know if any other settings are required.

Thanks in advance