> I am getting below error, while processing a big xml file 
> with saxon 9.

Firstly, you're not using Saxon 9: the stacktrace shows that you are using
Saxon 6.x.

Also, you're not using Saxon's TinyTree implementation, which is the
default; you are using the linked tree, which takes more space.

When you've fixed those issues, make sure you allocate enough memory to the
Java VM, by specifying -Xmx1024m say on the command line.

Oh, and product-specific questions are best sent to the saxon-help list or
forum at SourceForge.

Michael Kay
http://www.saxonica.com/

> 
> what configuation needs to be done to come out of this error.
> 
> 
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
>         at java.util.Arrays.copyOfRange(Unknown Source)
>         at java.lang.String.<init>(Unknown Source)
>         at 
> com.icl.saxon.tree.TreeBuilder.characters(TreeBuilder.java:231)
>         at 
> com.icl.saxon.output.ProxyEmitter.characters(ProxyEmitter.java:101)
>         at com.icl.saxon.om.Stripper.characters(Stripper.java:201)
>         at com.icl.saxon.ContentEmitter.flush(ContentEmitter.java:220)
>         at 
> com.icl.saxon.ContentEmitter.endElement(ContentEmitter.java:139)
>         at 
> com.icl.saxon.aelfred.SAXDriver.endElement(SAXDriver.java:792)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseETag(XmlParser.java:1133)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseContent(XmlParser.java:1217)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseElement(XmlParser.java:1037)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseContent(XmlParser.java:1222)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseElement(XmlParser.java:1037)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseContent(XmlParser.java:1222)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseElement(XmlParser.java:1037)
>         at 
> com.icl.saxon.aelfred.XmlParser.parseDocument(XmlParser.java:510)
>         at com.icl.saxon.aelfred.XmlParser.doParse(XmlParser.java:163)
>         at com.icl.saxon.aelfred.SAXDriver.parse(SAXDriver.java:320)
>         at com.icl.saxon.om.Builder.build(Builder.java:258)
>         at 
> com.icl.saxon.PreparedStyleSheet.prepare(PreparedStyleSheet.java:113)
> 
>         at 
> com.icl.saxon.TransformerFactoryImpl.newTemplates(TransformerFactoryI
> mpl.java:127)
>         at com.icl.saxon.StyleSheet.doMain(StyleSheet.java:327)
>         at com.icl.saxon.StyleSheet.main(StyleSheet.java:63)
> 
> Regards
>  Eugene