3731101 - SE10: double-click on BAdI entry returns "incorrect internal lock argument: 0"

When double-clicking an entry of type “Customizing Entries for Business Add-In Implementations” in Transport Organizer, the following error occurs:

Incorrect internal lock argument:   0
Message No. TK312

Diagnosis
The request locks for lock object  (sample length 0 and lock key ) cannot be selected.

Reason:
Object = "Space" or
Key = "Space" or
Sample length is greater than 64
System Response
The function was cancelled.

• SAP_BASIS 758 until SP06
• SAP_BASIS 816 until SP02

SE10, SE01, Transport Organizer, TK312, incorrect internal lock argument 0, SXCC, BAdI activation, customizing entries, double-click error, generic display tool, non-lockable object, lock key empty, TR_OBJECT_JUMP_TO_TOOL, RS_TOOL_ACCESS, WB_MNGR_START_FROM_TOOL_ACCESS , KBA , BC-DWB-CEX-BAD , BAdIs , Problem