Java heap error when using compc

Question

I have a large project, 100's of source files that I'm trying to compile into a swc. In Flash Builder 4 it works fine. When I try to do it in compc I get a Java heap space error. I've scoured google for help and haven't found anything useful. Does anyone on here know much about ant or compc? What am I doing wrong?
Here's the code that I use to compile. It gets all the files for me so I don't have to type them in one at a time. That part seems to work, it's when it calls compc that ant hangs for about 30 seconds then quits with a Java heap space error.
          <target name="-resolve-shared-classes">
          <path id="list_1">
               <fileset dir="${basedir}\${shared.source}\">
                    <include name="com\**" />                    
                    <include name="edu\**" />
               </fileset>
          </path>
          <pathconvert property="project_classes_property" pathsep=" " dirsep="." refid="list_1">
               <map from="${basedir}\${shared.source}" to="" />
               <mapper>
                    <chainedmapper>
                         <globmapper from="*.as" to="*" />                         
                    </chainedmapper>
                    <chainedmapper>
                         <globmapper from="*.mxml" to="*" />                         
                    </chainedmapper>
               </mapper>
          </pathconvert>
          <echo>${project_classes_property}</echo>
     </target>
     <target name="compileShared" depends="-resolve-shared-classes">
          <compc fork="true" output="${basedir}\${shared.bin}${shared.name}.swc"
               include-classes="${project_classes_property}">               
               <load-config filename="${basedir}\${shared.source}sharedConfig"/>     
               <source-path path-element="${basedir}\${shared.source}"/>                                   
          </compc>
     </target>

Answer 1

I have a large project, 100's of source files that I'm trying to compile into a swc. In Flash Builder 4 it works fine. When I try to do it in compc I get a Java heap space error. I've scoured google for help and haven't found anything useful. Does anyone on here know much about ant or compc? What am I doing wrong?
Here's the code that I use to compile. It gets all the files for me so I don't have to type them in one at a time. That part seems to work, it's when it calls compc that ant hangs for about 30 seconds then quits with a Java heap space error.
          <target name="-resolve-shared-classes">
          <path id="list_1">
               <fileset dir="${basedir}\${shared.source}\">
                    <include name="com\**" />                    
                    <include name="edu\**" />
               </fileset>
          </path>
          <pathconvert property="project_classes_property" pathsep=" " dirsep="." refid="list_1">
               <map from="${basedir}\${shared.source}" to="" />
               <mapper>
                    <chainedmapper>
                         <globmapper from="*.as" to="*" />                         
                    </chainedmapper>
                    <chainedmapper>
                         <globmapper from="*.mxml" to="*" />                         
                    </chainedmapper>
               </mapper>
          </pathconvert>
          <echo>${project_classes_property}</echo>
     </target>
     <target name="compileShared" depends="-resolve-shared-classes">
          <compc fork="true" output="${basedir}\${shared.bin}${shared.name}.swc"
               include-classes="${project_classes_property}">               
               <load-config filename="${basedir}\${shared.source}sharedConfig"/>     
               <source-path path-element="${basedir}\${shared.source}"/>                                   
          </compc>
     </target>