Clearing certain fields after scanning

I have a form that asks the user for certain information and then once they scan, they want to keep certain fields populated but others cleared out.  The fields that need to be cleared are "String Lists".  I tried to script it so that a button just clears out the string lists (i.e.  Call Form.UpdateListField("Choice 1",True, arrDocTypes,"") where arrDocTypes is just reading a text file for document types (ala Solutions Framework).

However, when I do it this way and try to scan something without populating the fields that I cleared out, Ricoh comes up with a message "Fileds [Choice 1] are required.  I don't have these marked as required in AutoStore.

I have attached a zip file with the cfg and code files.  Should be able to just unzip to C:\ and test it.

I am wondering if I need to clear something out in the "On_Scan" function?

Thanks in advance!