E2921 Cmd Rej: LFS must not be running on requested link
The command cannot be entered if an LFS test is running on the specified link.
Recovery
Determine whether an LFS is running on the link. Enter the rept-stat-lfs command.
Halt the LFS test if desired (see the Database Administration - SS7 User's Guide for assistance) or wait until the test is complete and re-enter the act-cdl or tst-slk command that generated this error message.