Solution : https://service.sap.com/sap/support/notes/551865 (SAP Service marketplace login required)
Summary :
In SAP systems using the Public Sector industry solution with Release 4.6C, an issue occurs in transactions ME21/ME21N when creating a service order from a reference document (external services contract). Despite correct maintenance of rate relations, error SG105 is erroneously triggered. This error also potentially affects transactions ME51N and ME51. A program correction has been provided to resolve this issue and ensure error-free service order creation from reference documents.
Key words :
symptom transaction me21/me21n creating, system displays error message sg105, industry solution public sector, relevant rate relations, attached program correction, service order, reference document, external services, maintained correctly, terms me51n