If you create a link from a generated port and the generated port is no longer available, the Developer tool shows the link to the port as an unresolved link.

For example, you update the input rule for the "From_Read_EMPLOYEE" dynamic port in the Sorter transformation to exclude the "name" port. The Developer tool changes the link to an unresolved link.

The following image shows an unresolved link to the port "name" in the Expression transformation:

The Developer tool shows a warning message for unresolved links when you validate the mapping. If the generated port is available when you run the mapping, the Data Integration Service resolves the link and processes the mapping. However, if the Data Integration Service cannot resolve the link, the mapping fails. You must remove the unresolved links to successfully run the mapping. Right-click the transformation and select

Clear Unresolved Links

to clear any unresolved links in a transformation.