Howto Convert or Export Markups as DXF

Pardon me if this is the wrong forum

I looked for any forum specific to Autovue and could not find any

I see in the autovue javadocs a method to convert Markups to DXF

Can anyone give me a sample of how to make the call

public java.io.InputStream convertMarkup(java.lang.String markupFile,
                                         java.lang.String[] auxiFiles,
                                         MarkupConvertOptions convertOptions)
                                  throws java.io.IOException

Converts the specified markup to a format specified by the conversion options.

I have access to the VueBean and MarkupBean, have the markup loaded

I tried this code but it does not work;

            VueBeanController vbc = new VueBeanController(m_vueBean);