getting warning error after generate mapping source file

dear sir i am getting this error whwen i am generating mapping - validate

plese give me solution as per below error

There are field(s) which are not mapped to Entity- Customer address

It’s seems date you’re talking about the Data Import Export Framework in AX 2012 or AX 7.
It says that not all fields from the source have been mapped to the entity. Open the mapping and review which fields it’s about. It may be all right, or maybe you need add mappings manually.