Axel AX3000 65 User's Manual - Manual (Page 208)

Remote Set-Up
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AX3000 - User's Manual
ERR 220: Too many RDP sessions with BitMap cache active.
Command: setup_send
Cause: the two RDP session are set with the "Cache Bitmap".
Consequence: the "Cache Bitmap" had been disabled for the second RDP
session.
Solution: only one RDP session can use the "Cache Bitmap".
ERR 221: Service and RDP redirection conflict.
Command: setup_send
Cause: an auxiliary port is used by both the RDP redirection and by
a network service.
Consequence: the auxiliary port doesn't work properly.
Solution:
the conflict must be fixed.