Mappings > Mappings > Mapping revisions and mapping tasks
  

Mapping revisions and mapping tasks

You might need to update a mapping that is used in a mapping task.
When you update a mapping used in a mapping task, the mapping task uses the revised mapping. If you change the mapping so that the mapping task is incompatible with the mapping, an error occurs when you run the mapping task.
For example, you add a parameter to a mapping after the mapping task was created and you do not update the mapping task to specify a value for the parameter. When you run the mapping task, an error occurs.
If you do not want your updates to affect the mapping task, you can make a copy of the mapping, give the new mapping a different name, and then apply your updates to the new mapping.