jbpm error in task completion .

[masummymesingh]

According to this video tutorial : https://www.youtube.com/watch?v=D8EMUgBqSHQ

I have develop a business process , it deploy and process started successfully ok, but when i am  task complete / relese from Tasklist then it will give this error .

i am try to do this several time but always i am got this "stupid " error .

Error :

Caused by: java.lang.RuntimeException: unable to execute ReturnValueEvaluator:

Caused by: java.lang.RuntimeException: Exception when trying to evaluate constraint  in split

=================================================================================================

[masummymesingh]

[masummymesingh]

I understand my error , "can not setup process varriable person"

How can i set process varriable called person to a non null value ?

where "process variable" value setup location i can not find out this place in jbpm console

according to this video tutorial ?

[eschabell]

It is always a good practice to set the variables to a default value if they are going to be used in a gateway (decision)... you can default them out on process start if you are not requiring your users to submit a value (rules can be used to validate input data for example).

[masummymesingh]

hi Eric D. Schabell thanks for your cooperation.

i understand that defult process value setup criteria .

1. for gateway decision

2. process start time

3. user submit time

already , i have setup all(3) value (person) from process start , that are show in the screenshot.

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Question : i think my program fail when masum task > adult or teenager task (when) perform gatway .

            Just give answer how can overcome this error ?

My Application details is :

--------------------------------

My dataObject Is :

class Person

  int age ;

  string name;

  boolean adult;

  -----------------------

  my gateway decision value is :

  return person.getAdult()==true;

  return person.getAdult()==false;

  ------------------drl-------------------------

  import com.aic.Person

  rule "set as adult" ruleflow-group "personrules"

  no-loop

  when

      $p:Person(age>=18)

  then

          modify($p){

          setAdult(true);

          }

  end

  rule "set as teenager" ruleflow-group "personrules"

  no-loop

  when

      $p:Person(age<18)

  then

          modify($p){

          setAdult(false);

          }

end

================================================================ 

[eschabell]

In your gateway it would be far easier to do this (as it's java, not a rule call):

return person.getAge() >= 18;

Rules need to be called in a session and I believe you are losing the session by the time you leave the rule task....

[mjabbarvand]

Hi Gulam

I think you should select "person" in simple task Data I/O form (like the below picture)

to do this you should define variable Person in variable definition part of process

However I try this, BUT I cant run the process. I recieve below error

"Error found parsing script:
Function call was not found, a token like "KieFunctions.functionName(variable, params)" is expected."

in that video (version 6.1 i think), Editor section is not seen (like below picture) and you should enter

return person.getAdult() == true; in script section. but in 6.3 version I dont know how to use business

rule :(

[mjabbarvand]

I solve my problem with substituting

(return person.getAdult() == true;) with (return  KieFunctions.isTrue(person.getAdult());) and

(return person.getAdult() == false;) with  (return  KieFunctions.isFalse(person.getAdult());)

and I use person for both input and output of business rule task...