Update process variable at runtime

There's likely two problems here. First, you can only use a!save() in an interface. If you want to save into a process variable, you should use a script task and add a Data > Output. Using the output you can create any expression and save the results into a process variable. The second issue is that whatever node you're using doesn't have the correct kind of form. If you truly are just updating a process variable directly, you shouldn't have a form at all.

If you still have questions, can you provide more information about your configuration? Where did you configure that expression? What does your process do? Can you share screenshots of what you configured?

Hi Peter Lewis,

Actually, I am using MS Word 2007 Doc From Template smart service. At one of its tag (i.e Schedule_1) I and trying to writer expression which can dynamically update process variable so that each time the control comes at that tag it gets updated value from process variable which I am trying to update dynamically.

MS Word 2007 Doc From Template :

Schedule_1 tag expression editor :

This is not a valid place in which to try to update your PV.  You'd need to do it in your Data / Output tab at least, though if it were me I'd leave it out of the MS Word from Template node altogether and update the value in its own script task afterwards in the style Stewart Burchell already illustrated in another comment here.

This is not a valid place in which to try to update your PV.  You'd need to do it in your Data / Output tab at least, though if it were me I'd leave it out of the MS Word from Template node altogether and update the value in its own script task afterwards in the style Stewart Burchell already illustrated in another comment here.