This error occurs after using the GIFTS Import module and is related to an address not being available in the import file for the specific organization. The import process will conclude successfully. However, if a Payment record created from the import is modified afterwards in GIFTS and you attempt to Save and Close , the following error will occur:
**ERROR MESSAGE** GIFTS Run-time error '381': Invalid property array index
Even though the validation process during import does not require it, when performing summary imports, be sure to include an address for ALL Organizations. If the import is already complete, open the associated Organization record and add address information before attempting to modify any Payments.