Solution : https://service.sap.com/sap/support/notes/398783 (SAP Service marketplace login required)
Key words : 
additional key words task list, imrm                        enter function module exit_saplci20_001, general maintenance task list, customer exit exit_saplci20_001 import, create customer exit ci200001, technical location task lists, component processing  development class, development class imrm, general task list, individual task lists
Related Notes : 
       
| 526975 | Task list components 4.6A and 4.6B | 
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| 413373 | Task list components 46 C (Part 2) | 
| 407413 | Task list components in Release 3.1I | 
| 403701 | New component processing (deactivation) | 
| 401893 | New component processing (Activation) |