[OnePlus 7T Pro (Regular & McLaren) ROMs & Dev.] vikna:
Hi. I have tried to install it on my OnePlus 7T Pro but ended up at QualComm CrashDump Mode.

Can someone advise where I went wrong?

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot -w

Erasing 'userdata' OKAY [ 0.253s]

mke2fs 1.45.4 (23-Sep-2019)

Creating filesystem with 56734085 4k blocks and 14188544 inodes

Filesystem UUID: c6bbb230-134f-11eb-96ea-ebd61cf0b2b0

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done

Writing inode tables: done

Creating journal (262144 blocks): done

Writing superblocks and filesystem accounting information: done

Sending 'userdata' (980 KB) OKAY [ 0.032s]

Writing 'userdata' OKAY [ 0.007s]

Erasing 'metadata' OKAY [ 0.008s]

Erase successful, but not automatically formatting.

File system type raw not supported.

Finished. Total time: 1.182s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash system_a system.img

Invalid sparse file format at header magic

Sending sparse 'system_a' 1/2 (779105 KB) OKAY [ 19.896s]

Writing 'system_a' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash boot_a boot.img

Sending 'boot_a' (98304 KB) OKAY [ 2.415s]

Writing 'boot_a' OKAY [ 0.352s]

Finished. Total time: 2.828s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash odm_a odm.img

Sending 'odm_a' (102400 KB) OKAY [ 2.497s]

Writing 'odm_a' FAILED (remote: '(odm_a_b) No such partition')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash product_a product.img

Invalid sparse file format at header magic

Sending sparse 'product_a' 1/1 (611952 KB) OKAY [ 15.499s]

Writing 'product_a' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vbmeta_a vbmeta.img

Sending 'vbmeta_a' (8 KB) OKAY [ 0.016s]

Writing 'vbmeta_a' OKAY [ 0.003s]

Finished. Total time: 0.075s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vbmeta_system_a vbmeta_system.img

Sending 'vbmeta_system_a' (4 KB) OKAY [ 0.006s]

Writing 'vbmeta_system_a' OKAY [ 0.003s]

Finished. Total time: 0.077s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vendor_a vendor.img

Invalid sparse file format at header magic

Sending sparse 'vendor_a' 1/2 (777931 KB) OKAY [ 20.137s]

Writing 'vendor_a' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash dtbo_a dtbo.img

Sending 'dtbo_a' (24576 KB) OKAY [ 0.611s]

Writing 'dtbo_a' OKAY [ 0.110s]

Finished. Total time: 0.778s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash system_b system.img

Invalid sparse file format at header magic

Sending sparse 'system_b' 1/2 (779105 KB) OKAY [ 20.602s]

Writing 'system_b' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash boot_b boot.img

Sending 'boot_b' (98304 KB) OKAY [ 2.394s]

Writing 'boot_b' OKAY [ 0.372s]

Finished. Total time: 2.838s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash odm_b odm.img

Sending 'odm_b' (102400 KB) OKAY [ 2.489s]

Writing 'odm_b' FAILED (remote: '(odm_b_b) No such partition')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash product_b product.img

Invalid sparse file format at header magic

Sending sparse 'product_b' 1/1 (611952 KB) OKAY [ 15.751s]

Writing 'product_b' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vbmeta_b vbmeta.img

Sending 'vbmeta_b' (8 KB) OKAY [ 0.011s]

Writing 'vbmeta_b' OKAY [ 0.002s]

Finished. Total time: 0.079s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vbmeta_system_b vbmeta_system.img

Sending 'vbmeta_system_b' (4 KB) OKAY [ 0.015s]

Writing 'vbmeta_system_b' OKAY [ 0.003s]

Finished. Total time: 0.084s

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash vendor_b vendor.img

Invalid sparse file format at header magic

Sending sparse 'vendor_b' 1/2 (777931 KB) OKAY [ 20.226s]

Writing 'vendor_b' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

PS C:\Users\vikna\OneDrive\Desktop\Android\payload_dumper-win64\payload_output> fastboot flash dtbo_b dtbo.img

Sending 'dtbo_b' (24576 KB) OKAY [ 0.614s]

Writing 'dtbo_b' OKAY [ 0.068s]

Finished. Total time: 0.724s

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how to go into fastbootd?