Workflow Modeler:Iterating using the workflow variable

Hi ,
I have a requirement to iterate a user task thrice . i was setting the workflow variable in task previous to the user task and then iterating it thrice using the script in conditional link(checking the condition ).i am using append to increment this counter variable.i am getting an error that the workflow cannot be instantiated.kindly suggest how to go about it? Also are the workflow variables available only for that particular task??? if yes then how workflow variables and task variables differ?

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kshitiz

Hi ,
I have a requirement to iterate a user task thrice . i was setting the workflow variable in task previous to the user task and then iterating it thrice using the script in conditional link(checking the condition ).i am using append to increment this counter variable.i am getting an error that the workflow cannot be instantiated.kindly suggest how to go about it? Also are the workflow variables available only for that particular task??? if yes then how workflow variables and task variables differ?

Workflow variables are just like global variables. They can be accessed by any task. On the other hand task varibles' scope is local to that particular task only.

In your scenario, you have to set a workflow variable indicating the count how many times your user task has been activated. Have an external task before that user task and increment the count, check the count and make the transition accordingly.

What is the particular error that you are getting on workflow instantiation??

Sanchita

i have a workflow something as follows:

userTask1---->userTask2---->userTask3

i am setting a workflow variable equal to 0 for userTask1 then i am append it by 1 in userTask2 and calling the userTask2 based on the script for the transition from userTask2 to userTask3.

Is an external task required for it ? can't we do without it. as per my understanding we can't chnage the value of the global variable ..is the case same with workflow variables?

while instantiating as soon as i say submit the page goes blank and browser shows the header error.thats it. no other elaborations on it (err).

kshitiz

i have a workflow something as follows:

userTask1---->userTask2---->userTask3

i am setting a workflow variable equal to 0 for userTask1 then i am append it by 1 in userTask2 and calling the userTask2 based on the script for the transition from userTask2 to userTask3.

Is an external task required for it ? can't we do without it. as per my understanding we can't chnage the value of the global variable ..is the case same with workflow variables?

while instantiating as soon as i say submit the page goes blank and browser shows the header error.thats it. no other elaborations on it (err).

Yes you have to use external task to increment your workflow variable. How are you doing that in a user task?

Adam Stoller

Hi ,
I have a requirement to iterate a user task thrice . i was setting the workflow variable in task previous to the user task and then iterating it thrice using the script in conditional link(checking the condition ).i am using append to increment this counter variable.i am getting an error that the workflow cannot be instantiated.kindly suggest how to go about it? Also are the workflow variables available only for that particular task??? if yes then how workflow variables and task variables differ?

Can you expand upon this "requirement to iterate a user task thrice"?
Are you changing the ownership of this usertask in between iterations?
If not - why do you need to activate the same task for the same user three times?
If so - why don't you just create three usertasks in succession with different owners?
You seem to be going out of your way to complicate what is probably a relatively simple process.

Sanchita

well your right i'll be changing the ownership of the user task for thrice. But for the time being i was jus testing that how to loop around a user task .I cant use three successive user task coz if the requirement changes and we need to loop around 10 times then this logic will be better.

i'll tried with external task .i am taking a workflow start op variable(say counter) in ext task and initailizing it to zero .then when in transition i am using it to chk the cond the script gives me err saying " counter not defined"
i am basically not gettin a way to define this counter which i can globally access and change throughout my workflow.

kshitiz

Consult the perldocs for TeamSite::WFworkflow. There are methods for getting and setting workflow variables.

Adam Stoller

well your right i'll be changing the ownership of the user task for thrice. But for the time being i was jus testing that how to loop around a user task .I cant use three successive user task coz if the requirement changes and we need to loop around 10 times then this logic will be better.

At what point do you determine that you need to loop N times through the usertask?
Is it when the job instantiation form is filled out, or after the job has been instantiated and at least one task has already been activated?

i'll tried with external task .i am taking a workflow start op variable(say counter) in ext task and initailizing it to zero .then when in transition i am using it to chk the cond the script gives me err saying " counter not defined"
i am basically not gettin a way to define this counter which i can globally access and change throughout my workflow.

As pointed out - there are methods for accessing job variables in the Perl modules - though what you've failed to disclose is the version of TeamSite you're using and, if it is 6.7.1, whether you are using WFT or WFM -- this kind of information may have a significant effect on the accuracy and usefulness of the responses you get.

Also - since you indicate that you've done some coding for this, but the code isn't working - it would be useful for you to post the code you have, since it might be a simple oversight in the way you coded it.