'550 No such directory' does not stop racetask

Spam during +5H until i make a "!stop 6457"

0223|11:25:41 <zSL> [ERROR] RACE 6457 SRC1->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|11:25:42 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|11:25:42 <zSL> [ERROR] RACE 6457 SRC1->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|11:25:43 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|11:25:44 <zSL> [ERROR] RACE 6457 SRC1->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.

info :

0623|04:05:23 <zSL> [KB] TVRIP-FR DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W Dirlist added to : DEST (NOT PRESITE) from event PRE
0623|04:05:28 <zSL> [PAZO] TVRIP-FR DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W Proof Dirlist added to : DEST (DEST SITE)

... RACE blabla ...

Console Msg giving up :
23|04:16:05 <zSL> [EMPTY] SRC3: TVRIP-FR DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W Proof is still empty after 636 seconds, giving up...

but few seconds after sl fixed with a jpg transfert

23|04:16:10 <zSL> RACE 6457 SRC2->SRC3: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (12) 1.25mB @ 3.22mB/s
23|04:16:10 <zSL> RACE 6457 SRC2->SRC3: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (12) 1.25mB @ 3.22mB/s

then the spam retry start :

0223|04:17:04 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|04:17:04 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|04:17:05 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|04:17:05 <zSL> [ERROR] RACE 6457 SRC2->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|04:17:05 <zSL> [ERROR] RACE 6457 SRC1->DEST: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
....
0223|11:25:50 <zSL> [ERROR] RACE 6457 SRC1->LNA: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.
0223|11:25:50 <zSL> [ERROR] RACE 6457 SCR1->LNA: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W dcs.legends.of.tomorrow.s02e01.french.bdrip.x264-sh0w-proof.jpg (8) 550 No such directory.

Destination DEST is auto archive after complete ~ 10min -> then "550 error message" is normal

Fri.23|04:07:02 <@DEST> COMPLETE :: tv :: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W :: 367MB in 1m19s by 3 racers 
Fri.23|04:17:03 <@DEST> ARCHIVED :: tv :: DCs.Legends.of.Tomorrow.S02E01.FRENCH.BDRip.x264-SH0W :: /archive/tv/DCs.Legends.Of.Tomorrow/S02/ :: 394.59MB :: 1.17s :: 321.91MB/s

I stop manually !

Fri.23|11:28:26 <@> !stop 6457
Fri.23|11:28:26 <sl> Ok. 

What about kill race after xx retry with 550 result ?