Throwing Error Messages: [You can not transition a null issue.] error during change status

[Prashant Mali]

I want to change the status of linked issue from resolved to waiting for triage.

 Reopen is a transition in between them. and I am getting action ID 131 of this transtion. using below code

com.opensymphony.workflow.loader.StepDescriptor currentStep = workFlow.getLinkedStep(link.destinationObject.getStatus());
// com.opensymphony.workflow.loader.StepDescriptor currentStep = workFlow.getLinkedStatusObjects();
IssueService issueService = ComponentAccessor.getIssueService();
List<ActionDescriptor> actions = currentStep.getActions();

log.error "Size"+actions.size()
for (ActionDescriptor action: actions)
{
log.error "Action name:" +action.getName()
if (action.getName().equals("Reopen"))
{
int a=action.getId();

IssueInputParameters issueInputParameters = new IssueInputParametersImpl();

log.error "Action ID"+ a +"User " +appUser+""+id+""+issueInputParameters;
TransitionValidationResult transitionValidationResult= issueService.validateTransition(appUser,id,10005, issueService.newIssueInputParameters());
if (transitionValidationResult.isValid()) {
IssueResult transitionResult = issueService.transition(appUser, transitionValidationResult);
}
else{

ErrorCollection errorCollection = transitionValidationResult.getErrorCollection();

log.error "Result Check"+errorCollection
// showTransitionErrors(transitionValidationResult);
}

but still getting TransitionValidationResult is Invalid. Why it is so? where is the problem.

[Nic Brough -Adaptavist- · Accepted solution]

You don't appear to be giving it an issue to transtion.