Solution : https://service.sap.com/sap/support/notes/491923 (SAP Service marketplace login required)
Key words : 
rtc=16 enxxmenq1377 gea internal lock administration error, geg lock table overflowgzz > eqsetcluster, basis support package level sapkb62026, transport management system - transaction stms, basis support package level, terms system exception error_message, bc-sec-usr-adm, post-client import methods, support package sapkb62026, bc-sec-usr
Related Notes : 
       
| 901256 | Rabax "CALL_FUNCTION_SIGNON_INCOMPL" | 
| 862676 | CC-ERROR: Client import postprocessing (SCC7) deletes users | 
| 786238 | Client copy: Authorization problem with RMCSCLCC | 
| 785445 | CC-ERROR: SCC1 does not copy objects with the same name | 
| 749247 | PS texts do not exist after client copy | 
| 747092 | DB2/390: bad performance during client copy | 
| 718799 | CC ERROR: Loss of data during remote copy | 
| 698566 | RGZZGLUX: Missing authorization for client copy | 
| 691937 | FINB_TR(CC): Error message /EACC/DR028 in FINB_TR_EXEC_AI | 
| 691508 | CC-ERROR: DBIF_DSQL2_SQL_ERROR with option 390OPT | 
| 678942 | CC-ADMIN: Performance with buffered tables | 
| 677933 | CC-ERROR: Remote copy with SAP_USER loses addresses | 
| 664068 | CC-ERROR: Incorrect selection during remote copy | 
| 634620 | CC-TOPIC: Error in the client transport as of WAS 6.10 | 
| 629660 | SCM systems with clients that are not liveCache-relevant | 
| 624069 | CC-INFO: tp status incorrect/unknown | 
| 620253 | Problems when you transport Customizing addresses (6.20) | 
| 601196 | Client copy: Problems with report RCTXTCPY | 
| 596204 | TSV_ILLEGAL_REFERENCE - Error in table registration | 
| 592241 | CC ERROR: Client copy hangs on DB2/400 (iSeries) | 
| 591787 | 6.20: Client copy termination in EFG_FORM_CC_EXIT_AFTER | 
| 588497 | 620: Problems with client copy of table AQDB | 
| 572139 | CC-INFO: Client copy hangs with a certain table | 
| 572041 | DDIC_TYPE_INCONSISTENCY as a result of extending BAPIADDR3 | 
| 570683 | DDIC_TYPE_INCONSISTENCY for table REQADDRESS | 
| 568784 | Termination with client copy (Financials Basis) | 
| 565057 | Memory overflow in buffer synchronization | 
| 562628 | CC-ADMIN: Protecting the source from a second copy | 
| 560268 | BDT: Subscreen container generation after client copy | 
| 557132 | CC-TOPIC: Remote client copy | 
| 554387 | BDT: Subscreen container generation terminates after client | 
| 550226 | CC-ADMIN: Copying the Customizing takes a long time | 
| 541311 | CC-INFO: Parallel processes FAQ | 
| 503247 | |
| 493426 | Runtime error with 'TRINT_READ_LOG' as a background job | 
| 491022 | CC INFO: DDIC_TYPE_ or DBIF_NTAB_ runtime errors | 
| 489690 | CC INFO: Copying large production clients | 
| 446485 | CC-ADMIN: Special copying options | 
| 445195 | CC ADMIN: Remote copy with cross-client Customizing | 
| 211492 | Inconsistency between ABAP Dictionary <-> database | 
| 24853 | CC-INFO: Client copy, functionality | 
| 22514 | CC-INFO: Error analysis for client copy |