Unknown identifier name.
The script compiler can't locate the name of an item in the dictionary that you've referenced in script. Name is the item in the script that can't be identified.
Review the name to be sure it's spelled properly. To ensure that the name is referenced properly, click the Names button in the Script Editor window and find the name of the item. When you locate the item, highlight it and click OK; the Script Editor window will appear. Place the insertion point in the location where the name is referenced and choose Paste from the Edit menu. The name will appear (qualified, if necessary) in the location where you placed the insertion point.