RP/0/RP0/CPU0:R2#configure
Tue Sep  8 14:12:48.002 UTC
RP/0/RP0/CPU0:R2(config)#router isis 1
RP/0/RP0/CPU0:R2(config-isis)#net 49.0003.0020.0200.2002.00
RP/0/RP0/CPU0:R2(config-isis)#commit
Tue Sep  8 14:12:49.691 UTC
RP/0/RP0/CPU0:R2(config-isis)#net 49.0004.0020.0200.2002.00
RP/0/RP0/CPU0:R2(config-isis)#commit
Tue Sep  8 14:12:50.497 UTC
RP/0/RP0/CPU0:R2(config-isis)#net 49.0005.0020.0200.2002.00
RP/0/RP0/CPU0:R2(config-isis)#commit
Tue Sep  8 14:12:51.195 UTC

% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed [inheritance]' from this session to view the errors
RP/0/RP0/CPU0:R2(config-isis)#show configuration failed
Tue Sep  8 14:12:58.911 UTC
!! SEMANTIC ERRORS: This configuration was rejected by 
!! the system due to semantic errors. The individual 
!! errors with each failed configuration command can be 
!! found below.


router isis 1
 net 49.0005.0020.0200.2002.00
!!% Maximum area address count exceeded: maximum number of area addresses is 3
!
end

RP/0/RP0/CPU0:R2(config-isis)#abort
RP/0/RP0/CPU0:R2#show running-config router isis
Tue Sep  8 14:13:05.912 UTC
router isis 1
 net 49.0001.0020.0200.2002.00
 net 49.0003.0020.0200.2002.00
 net 49.0004.0020.0200.2002.00
 log adjacency changes
 address-family ipv4 unicast
 !
 interface Loopback0
  passive
  address-family ipv4 unicast
  !
 !
 interface GigabitEthernet0/0/0/0
  point-to-point
  address-family ipv4 unicast
  !
 !
 interface GigabitEthernet0/0/0/1
  point-to-point
  address-family ipv4 unicast
  !
 !
!

RP/0/RP0/CPU0:R2#show isis | include area
Tue Sep  8 14:13:06.937 UTC
  Manual area address(es):
  Routing for area address(es):