Validate the mapping specification to verify that the mapping specification has no errors. You can validate a mapping specification during different stages of the mapping specification development cycle. You must load a valid mapping specification to a target.
You can validate a mapping specification at the following stages of development:
During the mapping specification development cycle.
When you preview the results of the mapping specification.
When you load the results of the mapping specification to the target.
When you export the mapping specification logic to PowerCenter.
When you export the mapping specification logic as a virtual table.
When a validation error occurs, the mapping specification is not valid. The Analyst tool cannot load the results of the mapping specification to the target, or export the mapping specification logic as a virtual table or to PowerCenter .