Raiser's Edge Import reads your data file right to left. This error can occur when text field precedes the editable field. We recommend you include the following columns for editable addressee/salutations in this order:

Primary Addressee:
PrimAddEdit
PrimAddText
PrimAddID

Primary Salutation:
PrimSalEdit
PrimSalText
PrimSalID

NOTE: the PrimAddID and the PrimSalID field must be populated with a numeric value of the Addressee/Salutation format desired.  Determine this number by going to Config>Addressee/Salutation.  Right click in the area where the formats are visible and select Preview>Addressee/Salutation Report.  Each format will include a number with the format.  The desired format for the Addressee/Salutation is the value that should be used for the PrimAddID or the PrimSalID.