Hello, I'm facing couple of issue while duing item fulfillment. OVER_FULFILL_DISALLWD - You can not over-fulfill an item unless you have selected the 'Allow Overage on Item Fulfillments' preference. INSUFFICIENT_PERMISSION - You do not have permissions to set a value for element lastmodifieddate due to one of the following reasons: 1) The field is read-only; 2) An associated feature is disabled; 3) The field is available either when a record is created or updated, but not in both cases. Both these issue are intermittent some time order get fulfilled some time not. *(for permission issue I had already check lastmodified date over custom forms - screen fields) Thanks

I came across that last issue a few days ago. It was because for the transaction in question (for you, the IF), the permission was only set to 'Edit' however it needed to be set to 'Full'. Hope this helps.