Solution : https://service.sap.com/sap/support/notes/797371 (SAP Service marketplace login required)
Key words : 
error message plm_audit 046, input fields, audit type, field length, table field, exceed 40 characters, system displays, table field 2, prerequisites prerequisite, system runs
Related Notes : 
       
| 902083 | Unicode Collection Note for CRM 4.0 |