[SalesForce] Is Changed operator in Process Builder

I am checking whether Order OwnerId is changed or not in Process buider.If Changed update related records.

But getting below error when Order.Close_Date__c is updated through Workflow field update when Order.order_Status__c is set to Closed.

The flow failed to access the value for myVariable_old.OwnerId because it hasn't been set or assigned.

Here is the condition in process builder

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It looks like Is Changed operator is added recently in Spring 15.

Is it something related to this idea which says process builder – Access to Owner Fields

Some helpful link1, link2

Best Answer

I think it's because it's a new order. There is no old value to compare against. Change the process builder criteria to a formula which makes sure it doesn't fire if it is new. 

Ischanged( [Order].OwnerId) && ! Isnew()

As an important side note, I often need to use formulas in process builder criteria for Ischanged and Isnew as Salesforce doesn't consider a new record to be a chanted record.

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