resolveContextInstance(VariableScope.VARIABLE_SCOPE, association.getTarget());
                    if (variableScopeInstance != null) {
                        Object value = workItem.getResult(association.getSources().get(0));
                        if (value == null) {
                            try {
                                value = MVEL.eval(association.getSources().get(0), new WorkItemResolverFactory(workItem));
                            } catch (Throwable t) {
                                // do nothing
                            }
                        }
                        variableScopeInstance.setVariable(association.getTarget(), value);