To import a Nut file (analysis), select the Feed Analysis command in the Import group (in the Import/Export Tab); to import a Cst file (costs) select the Feed Costs command in the Import group.
During the first import of a Cst or Nut file, if the Import as user list box has been ticked, the user list is created in the target database with the same name and the same feeds of the original one. If an ingredient code has been assigned to each feed in the user list in the source database, it is strongly recommended to tick the Import by ingredient code option, to grant the correct identification of the feeds. Please note that with this option, feeds without an ingredient code are not imported.
Further imports of a Nut file will update the analysis data of the feeds in the user list, while in the case of a Cst file the costs of the feeds in the user list will be updated (in both cases the Import as user list box must be ticked); since a Cst file stores all feeds data (analysis and costs), during its import any feed in the file that has not been previously imported will be added to the target database with its analysis, values and costs.