If the user gets this error message it means that they have entered in to many Source: POS>TRANSACTIONS>CUSTOMER
Why: The user entered in more than 5 numbers into the zip code field. Please delete the numbers you have entered in an be sure to only put in a 5 digit zip code.
Correction: The user must not enter more than 5 numbers into the zip code field Example: 94583
Wiki Link:Customer Creation