Using Post Function to Update a Custom Date Field

unknown

I'm using the %%CURRENT_DATE%% to update a custom date field within a post function in part of my workflow.     Within this workflow/transition - there is a validation and associated screen to validate the correct entry of a different custom field.   Now I want to add a post function to auto fill in a date for another custom field.  This is the error I'm receiving after going through the validation step:

Unable to update custom field customfield_10414 - Actual Release Date in issue [UBS-1].

The custom field is a "date picker"

John Funk

Hi Karen,

Let me see if I understand all that is going on. 

You have a transition that has two post functions on it to update two different custom date fields to timestamp them with the current date. Correct?

And you have a validator on that same transition that checks to make sure that a custom field has a value (required field validator I assume). Correct?

And you have a transition screen associated with the transition to populate another custom field. Correct?

Is the field in the transition screen also the field being validated? 

Which field is now receiving the error?