I have only recently started to encountered difficulty resolving DTDs despite having successfully setup XML Catalog not long ago. Below are the detail on the current setup:
This setup used to work until recently.
Another PC with identical setup is still working. The only difference between the two is that this one is behind the firewall and the XML Catalog files are in D:\TMP\CATALOG compared to the other one, which is not on the network (LAN/Internet) and the files are located in E:\TMP\CATALOG.
I have updated catalog.xml to ensure that it is pointing to D:\TMP\CATALOG.
I am using JDOM 1.1, Saxon 6.5, TagSoup 1.2, JDK126.96.36.199, Netbeans 6.1 on Windows XP. The XSLT transformation process is working fine.