Solution : https://service.sap.com/sap/support/notes/80057 (SAP Service marketplace login required)
Key words : 
create capital investment program positions, additional key words raimhier, capital investment program position, runtime error assign_length_0 occurs, runtime error occurs, edit mask exceeds, maximum total length, edit masks meet, program position, program saplaipc
Related Notes : 
       
| 72519 | IM: Special character for masking is not visible | 
| 68521 | |
| 39321 | Capital inv. prog.: Runtime error or EAP019/20/21/22 | 
| 39311 | IM: Runtime error when maintaining edit screens | 
| 26393 | IM: Maintaining coding masks not possible OR ... |