Diagnosis
Some documents could not be changed during the mass change procedure.
The cause is probably documents from a document type where certainfields that you want to change are not changeable.

System Response
The items from the documents not changed are marked in red.

Procedure
You can display a change error log for each of these items (function inapplication toolbar). In the individual document change procedure youcan check which fields are changeable and change the documentsindividually if necessary.