Solution : https://service.sap.com/sap/support/notes/1623389 (SAP Service marketplace login required)
Key words : 
terms runtime errors conne_import_wrong_comp_lengexception      cx_sy_import_mismatch_errorreport /sapapo/ts_pstru_log_manage, message class /sapapo/tsm, select function <manage logs>, transaction /sapapo/mc62, transaction /sapapo/c3, change message number 798, subobject pstru reason, short text 'log, recent logs, transaction se91
Related Notes : 
       
| 1590418 | /SAPAPO/MC62 : Short dump when displaying details of a Log | 
| 1519781 | IMPORT_ALIGNMENT_MISMATCH instead of incorr component length | 
| 1173850 | |
| 1171862 |