Solution : https://service.sap.com/sap/support/notes/494013 (SAP Service marketplace login required)
Key words :
cancellation billing document type, billing document type, long runtimes occur, process overview displays, cancel billing documents, attached correction instructions, source code error, field 'transaction group', material index update, billing documents
Related Notes :
| 357643 | Performance bil.doc cancellation - index update |
| 103212 | Bad performance during SD document update |