E2866 Cmd Rej: TFATCABMLQ is invalid for C-link sets
The tfatcabmlq parameter cannot be changed for C linksets, because C linksets are the primary route for mated STPs.
Recovery
Display the linkset information. Enter the rtrv-ls command.
Revise the linkset configuration as desired. Refer to the Database Administration - SS7 User's Guide (SS7 links) or to the Database Administration - IP7 User's Guide (IP links) for assistance.
Re-enter the chg-ls command that generated this error message.