Solution : https://service.sap.com/sap/support/notes/180541 (SAP Service marketplace login required)
Key words : 
directory /general/r3server/abap/note, transport requests contained modification data, table definition stxb missing, table definition stxl missing, kd2k000166 kdfk000251 kdik000094 u9bk900162you, /usr/local/bin/car, handle large data sets, result long copy runtimes, table definition stxh missing, symptom copying texts takes
Related Notes : 
       
| 601196 | Client copy: Problems with report RCTXTCPY | 
| 589886 | CC-ERROR: Performance with the remote SAPscript copying | 
| 567573 | Client transport of forms | 
| 511042 | Obsolete forms after upgrade/Support Package | 
| 480180 | Download and installation of attachments for SAP notes | 
| 350189 | CC-TOPIC: Error messages, client copy terminations | 
| 339721 | CC INFO: Subsequent copy of long texts | 
| 338578 | CC-TOPIC: Error in client transport as of 4.5 | 
| 315837 | CC-ERROR: Texts are missing after RESTART | 
| 130787 | RSTXTCPY: Text copy from very large client | 
| 96732 | CC-INFO: DB2/390 - client copy is very slow | 
| 69444 | CC-TOPIC: Error messages/terminations up to 4.0B | 
| 67205 | CC-INFO: Copying large and productive clients | 
| 42770 | missing long texts after client copy | 
| 20497 | CC-INFO: Long texts with a client copy | 
| 1942 | How does R3trans work? |