Olivier is 100% right.... I'm afraid.... in the Taskcontroller code: initializing variables: | if (variableAccess.isReadable()) { | String variableName = variableAccess.getVariableName(); | Object value = contextInstance.getVariable(variableName, token); | log.debug("creating task instance variable '"+mappedName+"' from process variable '"+variableName+"', value '"+value+"'"); | taskInstance.setVariableLocally(mappedName, value); | } else { | submitting: if ( (variableAccess.isRequired()) | && (! taskInstance.hasVariableLocally(mappedName)) | ) { | ..... some error stuff | } | So Olivier is correct, but I personally would be in favour of changing the latter to if ( (variableAccess.isRequired()) | && (! taskInstance.hasVariableLocally(mappedName) | && (taskInstance.getVariable(variableAccess.getMappedName()) != null) ) | ) { | ..... some error stuff | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4084116#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...