Hi, I don’t know anything about this code snippet provided by a contributor but I can tell you why the NPE happens. This code seems to be calling Utils.getContextComponentManager() before calling Utils.setComponentManager(…) to set the component manager to use. note that this code is really not clean/nice and it would benefit if someone would develop a Filter Stream converter extension for jspwiki as it’s been done for confluence, see: * http://extensions.xwiki.org/xwiki/bin/view/Extension/Filter+Application * http://extensions.xwiki.org/xwiki/bin/view/Extension/Filter+Confluence+XML+… Hope it helps, -Vincent On 7 May 2015 at 22:21:26, Khjintcorp (khjintcorp(a)gmail.com) wrote: Sent from my iPhone Hi Vincent   I am trying to convert JSPwiki pages to Xwiki pages.For that I used the code which is in the link http://extensions.xwiki.org/xwiki/bin/view/Extension/JSPWiki+To+XWiki+Conve…   After I fixed all jar issues in classpath then  I ran the program, JspWikiImporter  I got the null pointer exception.   I saw  people posted the same messages in this group. I don’t see the answers for this matter.  Do you have any update for  the issue?       java.lang.NullPointerException        at com.xpn.xwiki.web.Utils.getContextComponentManager(Utils.java:695)        at com.xpn.xwiki.web.Utils.getComponent(Utils.java:752)        at com.xpn.xwiki.web.Utils.getComponent(Utils.java:781)        at com.xpn.xwiki.XWikiCompatibilityAspect.ajc$interFieldInit$com_xpn_xwiki_XWikiCompatibilityAspect$com_xpn_xwiki_XWiki$defaultReferenceEntityReferenceResolver(XWikiCompatibilityAspect.aj:87)        at com.xpn.xwiki.XWiki.<init>(XWiki.java:6450)        at com.xpn.xwiki.XWiki.<init>(XWiki.java:6441)        at JspWikiImporter.export(JspWikiImporter.java:72)        at JspWikiImporter.main(JspWikiImporter.java:62) Exception in thread "main" java.lang.RuntimeException: Export failed        at JspWikiImporter.export(JspWikiImporter.java:99)        at JspWikiImporter.main(JspWikiImporter.java:62) Caused by: java.lang.NullPointerException        at com.xpn.xwiki.web.Utils.getContextComponentManager(Utils.java:695)        at com.xpn.xwiki.web.Utils.getComponent(Utils.java:752)        at com.xpn.xwiki.web.Utils.getComponent(Utils.java:781)        at com.xpn.xwiki.XWikiCompatibilityAspect.ajc$interFieldInit$com_xpn_xwiki_XWikiCompatibilityAspect$com_xpn_xwiki_XWiki$defaultReferenceEntityReferenceResolver(XWikiCompatibilityAspect.aj:87)        at com.xpn.xwiki.XWiki.<init>(XWiki.java:6450)        at com.xpn.xwiki.XWiki.<init>(XWiki.java:6441)        at JspWikiImporter.export(JspWikiImporter.java:72)        ... 1 more   Thanks     Ken Liang Contractor Unisys Office: 571-468-2782