When you design a dataport in Microsoft Dynamics NAV, you add data items, and you set properties on the fields in the data items. If the FileFormat Property for the dataport itself is set to Fixed, you use the StartPos Property and Width Property (Dataport field) of each field to define how a record that is read from the external file is broken into fields. When you are exporting, these properties determine how data from the database is written to the external file.

Expand imageProperties for a Data Item Field

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