Good Day,
There are 2 things which can help to locate the core if present:
1. Log file may have message like:
%OS-COREHELPER-6-CORE_COPIED : Copied core xxxxxxx.xr-vm_node0_RP0_CPU0.293c6.core.gz to 0/RP0/CPU0:harddisk:
2. "show context" may also show the location:
RP/0/RP0/CPU0:ROUTER#show context
node: node0_RP0_CPU0
------------------------------------------------------------------
Core location: 0/RP0/CPU0:harddisk:/core_files/
Usually it can be found just in the root of harddisk:.
Niko
HTH,
Niko