SAP Message UIC057 - Necessary SAP editor is not active

Diagnosis
You have attempted to open a text document from the worklist, for whichthe necessary editor ("SAP Editor") is not activated.

System Response
The text document is not opened.

Procedure
If you want to ooen the text document, then switch the editor type:
Necessary step for switching the editor type:
Choose the tab "Editing" -> "Processing"
Choose "Utilities" -> "Set editor type..."
Set the indicator "SAP editor"
Note:
If you carry out this switch activity while processing a document
the current document is saved with the previous format, afterconfirmation. Subsequently a new document is created with the newdocument type.