When you delete data from a HEC-DSS file, the data is marked as missing but it is not actually removed from the file until you run a Squeeze of the file. You can recover deleted records with the Undelete command described in the next section. Once a file has been squeezed, records cannot be undeleted. To delete records from a HEC-DSS file:
1. Select the record or records to delete.
2. From the Edit menu, select Delete Records. A dialog box will confirm that you want to delete those records. If the number of data sets is four or less, their pathnames will be displayed in the dialog.
3. Click OK. A confirmation message will appear, stating that the records have been deleted.