Problem with Flex Builder

This same error comes if your "My Documents" etc. are a network share. So you have to remove flex, login as a local user and install it then.

You can do the following... it takes all the files from the source path and converts it to a format that the compc task can then use.

<fileset id="project.test.dir.fileset" dir="${project.test.dir}">
    <include name="**/*.as" />
    <include name="**/*.mxml" />
</fileset>
<property name="project.test.dir.fileset" refid="project.test.dir.fileset" />

<!-- Convert the test files into a compiler friendly format. -->
<pathconvert property="project.test.dir.path" pathsep=" " refid="project.test.dir.fileset">
    <compositemapper>
        <chainedmapper>
            <globmapper from="${project.test.dir}/*" to="*" handledirsep="true" />
            <mapper type="package" from="*.as" to="*" />
        </chainedmapper>
        <chainedmapper>
            <globmapper from="${project.test.dir}/*" to="*" handledirsep="true" />
            <mapper type="package" from="*.mxml" to="*" />
        </chainedmapper>
    </compositemapper>
</pathconvert>

<compc headless-server="true" default-frame-rate="${flex.default-frame-rate}" debug="${flex.compiler.debug.mode}" output="${build.swc.dir}/${test.component.name}.swc" include-classes="${project.test.dir.path}" directory="false">
    <source-path path-element="${project.test.dir}" />
    &dependencies;
</compc>

We use it to produce swcs for testing purposes.