Solution : https://service.sap.com/sap/support/notes/1459941 (SAP Service marketplace login required)
Key words :
enable multi-characterformat support, system issues error message, prerequisites reasonthis error occurs, multi-character format option, set ms word, formatted long text, user-defined texts, creating structure data, terms character formats, environment parameter longtext_format_support
Related Notes :
964987 | MS Word as SAPscript/Smart Forms editor: multi char formats |
742662 | MS Word as Editor in SAPscript and Smart Forms |