unsaved type for VariableInstance ---------------------------------- Key: JBPM-1057 URL: https://jira.jboss.org/jira/browse/JBPM-1057 Project: JBoss jBPM Issue Type: Bug Components: Core Engine Affects Versions: jBPM 3.1.3, jBPM 3.1.4, jBPM 3.2.3 Reporter: renaud chone Priority: Minor Fix For: jBPM 3.3.2 GA When creating a new process with Integer variables, I retrieve the same variables as a Long in a new session. In the database, the converter_ column contains only null values. I've identified the problem: there were two instances of IntegerToLongConverter. This is most likely a mistake but it's really hard to find. It would be a good idea to make the converter classes singleton or to use the class instead of the instance as a key in the HashMap of org.jbpm.db.hibernate.Converters.