Consider the following rules and guidelines when you copy metadata from Excel to the Developer tool:
You must confirm that the values in each cell are valid before copying the values to a transformation. For example, a string type cannot have a scale value other than "0." Precision values cannot be words and type values cannot be numbers. If the metadata is incorrect, an error message appears.
The location that you can copy metadata to depends on the type of transformation that you are updating. For example, the Paste (Replace) option might be unavailable when you right-click in the Properties view of a transformation. However, the option will still be available when you right-click directly within the transformation ports in the editor.