# Troubleshooting possible installation and upgrade issues

Follow the suggestions in these topics to help resolve common issues associated with installing and upgrading your Pentaho system:

* User Console themes render improperly after upgrade
* Pentaho Server does not start when installed on a virtual machine
* Context XML changes do not take effect after deploying a WAR
* No search manager configured for the Java repository
* Cannot create Jackrabbit tables in MySQL
* Unable to use the database init scripts for PostgreSQL
* JBoss fails to start
* Not able to login or run transformations
* Error when using sample transformations or jobs

See the **Administer Pentaho Data Integration and Analytics** document for additional troubleshooting information.