When you turn on the debugger, where does the code crash and can you see which variable is not set properly?

When you turn on the debugger, where does the code crash and can you see which variable is not set properly?

itemtoRem.saveToDisk = False  more likely itemtoRem is nothing because RemParameters does not exist on hPolicy doc

Are you having the issue with editing just old desktop polices?    Is there a issue when you create a new desktop policy?     Since the issue is with the policy document did you try refreshing the design of the document to the latest nab design?  You might be be able to trick it out and run a simple agent against the doc that adds a field RemParameters = "xxxx"   (field RemParameters := "xxx") so it would exist when the save code  runs,  The agent should be run from the view level on the doc in question