The 'USZIPCd' element is invalid.

The full error is here:

The 'USZIPCd' element is invalid - The value is invalid according to its datatype 'USZIPCdType' - The Pattern constraint failed.

Our Explanation: US Zip code is a required field that is 5 digits in length. Only digits can be used in the zip code and up to 4 digits can be used as the zip code extension. The most common error is the dropping of a leading 0 in the zip code. The zip code for Boston, MA is 02101 and excel will drop the leading 0 so that 2101 appears and imports. Put a ' (single apostrope) in front of the zip code in excel and that will format the cell as text and import in the full 5 digits. The single apostrophe will not import.