[Nexus 6P General] Michael833:
I'm not exactly sure what you mean, other than maybe the cmd window that I posted last time. I tried to updating the files in SDK Manager, but that didn't help either. Here is my output code again. If there is something else you wanted, please let me know.

C:\Android-sdk\platform-tools>fastboot flash bootloader D:\angler\images\bootloa
der-angler-angler-03.62.img
target reported max download size of 494927872 bytes
sending 'bootloader' (3532 KB)...
OKAY [ 0.130s]
writing 'bootloader'...
OKAY [ 0.210s]
finished. total time: 0.340s

C:\Android-sdk\platform-tools>fastboot reboot-bootloader
rebooting into bootloader...
OKAY [ 0.020s]
finished. total time: 0.030s

C:\Android-sdk\platform-tools>fastboot flash radio D:\angler\images\radio-angler
-angler-03.78.img
target reported max download size of 494927872 bytes
sending 'radio' (48728 KB)...
OKAY [ 1.515s]
writing 'radio'...
OKAY [ 2.172s]
finished. total time: 3.688s

C:\Android-sdk\platform-tools>fastboot reboot-bootloader
rebooting into bootloader...
OKAY [ 0.030s]
finished. total time: 0.030s

C:\Android-sdk\platform-tools>fastboot flash boot D:\angler\images\boot.img
target reported max download size of 494927872 bytes
sending 'boot' (12369 KB)...
OKAY [ 0.395s]
writing 'boot'...
OKAY [ 0.188s]
finished. total time: 0.583s

C:\Android-sdk\platform-tools>fastboot erase cache
******** Did you mean to fastboot format this ext4 partition?
erasing 'cache'...
OKAY [ 0.030s]
finished. total time: 0.030s

C:\Android-sdk\platform-tools>fastboot flash cache D:\angler\images\cache.img
target reported max download size of 494927872 bytes
erasing 'cache'...
OKAY [ 0.025s]
sending 'cache' (5752 KB)...
OKAY [ 0.180s]
writing 'cache'...
OKAY [ 0.110s]
finished. total time: 0.315s

C:\Android-sdk\platform-tools>fastboot erase recovery
erasing 'recovery'...
OKAY [ 0.032s]
finished. total time: 0.033s

C:\Android-sdk\platform-tools>fastboot format recovery
Formatting is not supported for file system with type ''.

C:\Android-sdk\platform-tools>fastboot flash recovery D:\angler\images\recovery.
img
target reported max download size of 494927872 bytes
sending 'recovery' (17905 KB)...
OKAY [ 0.581s]
writing 'recovery'...
OKAY [ 0.259s]
finished. total time: 0.842s

C:\Android-sdk\platform-tools>fastboot flash system D:\angler\images\system.img
target reported max download size of 494927872 bytes
erasing 'system'...
OKAY [ 0.549s]
sending sparse 'system' 1/6 (481085 KB)...
OKAY [ 15.713s]
writing 'system' 1/6...
OKAY [ 6.811s]
sending sparse 'system' 2/6 (481232 KB)...
OKAY [ 15.617s]
writing 'system' 2/6...
OKAY [ 6.818s]
sending sparse 'system' 3/6 (483325 KB)...
OKAY [ 15.144s]
writing 'system' 3/6...
OKAY [ 6.702s]
sending sparse 'system' 4/6 (482623 KB)...
OKAY [ 15.858s]
writing 'system' 4/6...
OKAY [ 7.007s]
sending sparse 'system' 5/6 (473155 KB)...
OKAY [ 15.462s]
writing 'system' 5/6...
OKAY [ 6.776s]
sending sparse 'system' 6/6 (354231 KB)...
OKAY [ 11.112s]
writing 'system' 6/6...
OKAY [ 5.017s]
finished. total time: 128.600s

C:\Android-sdk\platform-tools>fastboot flash vendor D:\angler\images\vendor.img
target reported max download size of 494927872 bytes
sending 'vendor' (199296 KB)...
OKAY [ 6.289s]
writing 'vendor'...
OKAY [ 3.359s]
finished. total time: 9.652s

C:\Android-sdk\platform-tools>fastboot format userdata
Creating filesystem with parameters:
Size: 58688266240
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 32768
Label:
Blocks: 14328190
Block groups: 438
Reserved block group size: 1024
Created filesystem with 11/3588096 inodes and 271280/14328190 blocks
target reported max download size of 494927872 bytes
erasing 'userdata'...
OKAY [ 1.061s]
sending 'userdata' (141002 KB)...
OKAY [ 4.270s]
writing 'userdata'...
OKAY [ 2.068s]
finished. total time: 7.402s

C:\Android-sdk\platform-tools>fastboot reboot
rebooting...

finished. total time: 0.021s

C:\Android-sdk\platform-tools>

I tried to do this erase, format and then flash process during my most recent trip through the flashing process in #9. The erasing worked fine, but the format step said:

C:\Android-sdk\platform-tools>fastboot format recovery
Formatting is not supported for file system with type ''.

Based on your suggestion, I'm guessing that's not supposed to happen.