Strange Runtime Problem

Hello all,

I have been using the EXPAT for a while, however this time around I am 
facing a stange error.
I am using the expat library in the dynamic link mode, with my code just 
including expat.h.

This is a small C++ Program with once class which is essentially using 
expat as the parser for some XML documents.  Here is a snippet of my ant 
file :

 <target name="CorpusReader" depends="init">
           <echo>Building Object for CorpusReader ...</echo>
          <exec executable="g++">
              <arg line="-g -I${include} -I${expat_inc} -L${lib_expat} 
-lexpat -o build/CorpusReader"/>
            <arg file="${src}/CorpusReader.cpp"/>
          </exec>
</target>


where lib_expat is <expat_dir>/lib
and expat_inc is <expat_dir>/include

The compile goes fine, however during the running of the Program I get a 
SEG FAULT at the point where the first chunk of my data is sent across 
XML_Parse. The GDB reads

Parsing 
File../trec/software/ConceptGraphBuilder/transitions/data/temp/layers.xml

Program received signal SIGSEGV, Segmentation fault.
0x4001a798 in XML_GetBuffer (parser=0x0, len=1024) at lib/xmlparse.c:1465
1465    lib/xmlparse.c: No such file or directory.
        in lib/xmlparse.c
Current language:  auto; currently c

I can't figure out for nuts the problem. Any help would be appreciated.

regards,
Anmol