Hello, What database are you using? If this is Mysql: 1. are you sure you merged/kept the hibernate.xml.cfg file? 2. Is the mysql JDBC jar file in place in WEB-INF/lib directory? (mysql-connector-xx.jar) 3. Are the rights of your user (in hibernate.xml.cfg) ok? Can you connect with it from the operating system? (mysql -u USER -p ) Regards, Guillaume Fenollar 2012/9/7 gogi <goran.buble@leica-geosystems.com>

Dear XWiki users,

When I try to migrate the database from the version 3.5.1 to the version 4.0, i get the following error message:

HTTP ERROR 500

Problem accessing /xwiki/bin/view/Main/. Reason:

Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3202 in 3: Exception while reading document [name = [XWikiPreferences], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [xwiki], type = [WIKI], parent = [null]]]] Wrapped Exception: Could not create a DBCP pool. There is an error in the hibernate configuration file, please review it.

Caused by:

com.xpn.xwiki.XWikiException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3202 in 3: Exception while reading document [name = [XWikiPreferences], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [xwiki], type = [WIKI], parent = [null]]]] Wrapped Exception: Could not create a DBCP pool. There is an error in the hibernate configuration file, please review it. at com.xpn.xwiki.XWiki.getMainXWiki(XWiki.java:413)

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