Solution : https://service.sap.com/sap/support/notes/72519 (SAP Service marketplace login required)
Key words : 
masking capital investment program positions, create auxiliary program zatai01j, additional key words oit1, display/maintain special characters, attributes type = 1 application =, call transaction oit1, current field contents, parameter edkz1 - edkz8, respective current contents, error causing case
Related Notes : 
       
| 398983 | Information: IM (Investment Management) | 
| 80057 | IM: Program position creation -> ASSIGN_LENGTH_0 |