A little debugging and found the <fo:flow> tag should have the flow-name attribute ! Lakshmi
-----Original Message----- From: Lakshmi Anantharaman [mailto:[EMAIL PROTECTED] Sent: Thursday, December 27, 2001 12:34 PM To: '[EMAIL PROTECTED]' Subject: [ERROR]: null All this while I experimented the examples that came with FOP distribution . Today I wrote a Fo on my own . And I tried to render to PDF from command prompt . But it did not go thru . The Log shows [INFO]: FOP 0.20.2 [INFO]: building formatting object tree [ERROR]: null Please Help me figure out what is wrong . The fo looks perfectly the fine/same as the examples .! ------------------------------------------------My Fo ------------------------------------- <?xml version="1.0" encoding="utf-8"?> <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"> <fo:layout-master-set> <fo:simple-page-master margin-right="50pt" margin-left="50pt" margin-bottom="50pt" margin-top="50pt" page-width="792pt" page-height="612pt"> <fo:region-body/> </fo:simple-page-master> </fo:layout-master-set> <fo:page-sequence> <fo:flow> <fo:block line-height="80pt" font-size="72pt" font-family="Arial"> FOP Hello World </fo:block> </fo:flow> </fo:page-sequence> </fo:root>