Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

timer_arm
time
Result String
sec_remain %ld msec_remain %ld
Where sec_remain and msec_remain are the remaining time before the next expiration of the timer.
A value of 0 will be returned for the sec_remain and msec_remain arguments if the timer type is CRON.
Note
Set _cerrno
Yes
(_cerr_sub_err =
This error means that the operating system reported an error. The POSIX errno value that is reported with the
error should be used to determine the cause of the operating system error.
(_cerr_sub_err =
This error means that the event type specified in the internal event specification was invalid.
(_cerr_sub_err =
This error means that an internal EEM request for memory failed.
(_cerr_sub_err = 11)
This error means that the event specification ID could not be matched when the event was being registered
or that an event detector internal event structure is corrupt.
(_cerr_sub_err = 12)
This error means that the event ID could not be matched when the event was being registered or that an event
detector internal event structure is corrupt.
(_cerr_sub_err = 22)
This error means that an internal EEM event detector pointer was null when it should have contained a value.
(_cerr_sub_err = 27)

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

2018
2) FH_ESYSERR (generic/unknown error from OS/system)
6) FH_EBADEVENTTYPE
9) FH_EMEMORY (insufficient memory for request)
FH_ENOSUCHESID (unknown event specification ID)
FH_ENOSUCHEID (unknown event ID)
FH_ENULLPTR (event detector internal error - ptr is null)
FH_ETMDELAYZR (zero delay time)
(Mandatory) Must exist if the timer type is not CRON.
Must not exist if the timer type is CRON. For
watchdog and countdown timers, the number of
seconds and milliseconds until the timer expires; for
an absolute timer, the calendar time of the expiration
time (specified in SSSSSSSSSS[.MMM] format,
where SSSSSSSSSS must be an integer representing
seconds between 0 and 4294967295, inclusive, and
where MMM must be an integer representing
milliseconds between 0 and 999). An absolute
expiration date is the number of seconds and
milliseconds since January 1, 1970. If the date
specified has already passed, the timer expires
immediately.
(unknown EEM event type)