Using XSLT files with dependants to transform XML

Hi,

I am using the 'PDF from HTML Transformation' Smart Service to apply an XSL Transformation on an XML file. The XSLT file has dependant files which it calls to access their templates (via relative file path).

Initially I setup my xslt file in Appian and added its dependant xslt files in the correct folder structure relative to it. Then I setup a basic process model using the Smart Service above to apply the xslt on an xml file and generate a pdf. The process executed successfully and a pdf was generated with the data, however it displayed blank for those outputs where it made calls to its dependants. 

Does anyone know how I can fix this issue so that the xslt can use the templates defined in its dependants?

Thanks