In Implementing the headless claims in PCI , there are below steps : 
1. Validate input XML against XSD
2. Transform the validated XML to XML supported by PCI.
3. Parse XML and use the workpage created to generate claim files and units.

But in the first step system is failing to get the XSD from the path ( Ignoring this ) 
Now in the second step while transforming the XML , getting the below error and not able to solve this.

** Problem invoking function: pega_procom_harvest.performXSLT--(String,String,boolean,HashStringMap), Unknown configuration option http://javax.xml.XMLConstants/property/accessExternalDTD 

Is that some problem in the function ?