Solution : https://service.sap.com/sap/support/notes/815751 (SAP Service marketplace login required)
Key words :
program sapmv45b - modify gui status 'u' - add, - modify gui status 'p' - add, attached source code modifications, text 'routing guide display', routing guide diplay buttons, routing guide display, slot called 'rtgr', slot called 'rtgd', sales order screen, routing guide
Related Notes :
| 815719 | FCX - Modifications to SAP core 4.6b |