XPlanner - Could not execute query

Have seen this a few times now, anyone got any ideas?

javax.servlet.jsp.JspTagException: net.sf.hibernate.JDBCException: Could not execute query at com.technoetic.xplanner.tags.db.UseBeansTag.doEndTag(UseBeansTag.java:133) at org.apache.jsp.index_jsp._jspService(index_jsp.java:83)