Drag and Drop from Client

[2018-11-14T10:48:18] DEBUG: drag info received, total drag file number: 1
[2018-11-14T10:48:18] DEBUG: dragging file 1 name: Gluecker.xml
[2018-11-14T10:48:18] DEBUG1: recv enter, 1919,428 25 0000
[2018-11-14T10:48:18] INFO: entering screen
[2018-11-14T10:48:19] DEBUG1: recv mouse up id=1
[2018-11-14T10:48:19] DEBUG: start receiving Gluecker.xml
[2018-11-14T10:48:19] DEBUG1: thread 0x00000368 entry
[2018-11-14T10:48:19] DEBUG: starting write to drop dir thread
[2018-11-14T10:48:19] DEBUG: dropping file, files=1 target=
[2018-11-14T10:48:19] ERROR: drop file failed: drop target is empty
[2018-11-14T10:48:19] DEBUG1: thread 0x00000368 exit
[2018-11-14T10:48:19] DEBUG1: recv leave