i found a similar Bug CSCtg46773. Please try the workaround:-
'copy run start'
NV: Invalid Pointer value(6128) in private configuration structure
%SYS-4-NV_BLOCK_INITFAIL: Unable to initialize the geometry of nvram
If the running-config and startup-config were noticed to be not the same size (dir all) and the
unit was rebooted several times during the flash boot process, the router would prompt for the
startup script and the NVRAM would be corrupted. At that point there would be no startup-config.
write erase is a workaround
If this helps you and/or answers your question please mark the question as "answered" and/or rate it, so other users can easily find it.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...