Maximum number of AP supported has already joined cisco

Question

Dear all,
We have vWLC, AP connected through MPLS network,  we also have ap base license for 15 AP, the problem is that AP cant joint to WLC because of
this error:
Maximum number of AP supported has already joined cisco
WLC shows that all 15 licenses are used, but we have only 3 AP
What is that? bug or not?, everything worked fine before we put new 4 AP into the network
thank you
I attached outputs in photos:

Answer 1

This license is evaluate and it works fine, but when it is our license it shows no AP in summary
(Cisco Controller) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.4.100.60
RTOS Version..................................... 7.4.100.60
Bootloader Version............................... 7.4.100.60
Emergency Image Version.......................... 7.4.100.60
Build Type....................................... DATA + WPS
System Name...................................... Cisco VWLC
System Location.................................. ESXI
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1631
IP Address....................................... 192.168.6.1
System Up Time................................... 0 days 17 hrs 29 mins 9 secs
System Timezone Location......................... (GMT +4:00) Muscat, Abu Dhabi
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... Multiple Countries:BY,MX,US
--More-- or (q)uit
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 7
Number of Active Clients......................... 41
Memory Current Usage............................. Unknown
Memory Average Usage............................. Unknown
CPU Current Usage................................ Unknown
CPU Average Usage................................ Unknown
Burned-in MAC Address............................ 00:50:56:9F:68:43
Maximum number of APs supported.................. 200
(Cisco Controller) >show ap summary
Number of APs.................................... 3
Global AP User Name.............................. Not Configured
Global AP Dot1x User Name........................ Not Configured
AP Name             Slots  AP Model              Ethernet MAC       Location          Port  Country  Priority
Meeting_Room         2     AIR-LAP1142N-E-K9      54:75:d0:f5:3a:e4  default location  1        BY       1
Fttb                 2     AIR-CAP3602I-A-K9     30:f7:0d:29:03:42  default location  1        MX       1
Technical            2     AIR-LAP1142N-E-K9      c8:9c:1d:f4:72:8a  default location  1        BY       1