Hi eesunj,
Junos creates the respective routing table once the protocol/family/stanza relative to that table is active on the configuration file. So you only get this kind of error message when you do not have family inet-vpn active on your BGP configuration
Check the below example
Without family inet-vpn (Table does not exist)
root@Siruisvmx> show configuration protocols bgp | match inet-vpn
root@Siruisvmx> show route table bgp.l3vp.0
error: No routing tables matching specification.
With family inet-vpn (Table exists)
root@Siruisvmx> show configuration protocols bgp | match inet-vpn
family inet-vpn {
root@Siruisvmx> show route table bgp.l3vpn.0
hope that helps, thanks
#familyinet-vpn