500 OOPS: vsf_sysutil_recv_peek

[19:43:12] [L] Connecting to xxx -> IP=xxx PORT=xxx
[19:43:12] [L] Connected to xxx
[19:43:12] [L] 220 Its private FTP, go away!
[19:43:12] [L] USER yyy
[19:43:12] [L] 331 Please specify the password.
[19:43:12] [L] PASS (hidden)
[19:43:12] [L] 230 Login successful.
[19:43:12] [L] SYST
[19:43:12] [L] 500 OOPS: cap_set_proc
[19:43:12] [L] 215 UNIX Type: L8
[19:43:12] [L] 500 OOPS: vsf_sysutil_recv_peek
[19:43:12] [L] REST 100
[19:43:12] [L] Connection failed (Connection lost)
[19:43:12] [L] Delaying for 1 seconds before reconnect attempt #1