Hi shivaram840,
After checking you config i found the following:
ip local pool RemoteVPNPool 172.16.10.1-172.16.10.250 mask 255.255.255.0
nat (inside,outside) source static DM_INLINE_NETWORK_6 DM_INLINE_NETWORK_6 destination static VPN_pool VPN_pool no-proxy-arp route-lookup
When check the objects with the name VPN_pool this one is not on the configuration, seems like you added this to the config and for some reason the object was removed, even though the ASA is not supposed to let you remove either one.
I will check the nat and after getting a client connected i will run a packet tracer from something on your inside to the ip assigned to the client:
packet-tracer input inside icmp 10.11.12.x 8 0 172.16.10.x detail
Hope this info helps!!
Rate if helps you!!
-JP-