The exact error string may vary slightly:
Huawei uses device-specific firmware (e.g., for the P30 Pro, Mate 40, Nova 7i). If you attempt to flash firmware intended for another model or region, Fastboot will reject the write command. Also, corrupt downloads of UPDATE.APP or fragmented payload files will trigger the fail. The exact error string may vary slightly: Huawei
If you have previously resized partitions, flashed a custom recovery (TWRP), or installed a GSI (Generic System Image), the partition layout may no longer match what the stock firmware expects. The multi-download tool sees a mismatch and aborts. for the P30 Pro