You don't have to send your message twice...we all have eyes in our head(I hope so!) so everybody can read this. So now to your question:My original question was there was an error when I tried to install it.
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I think Alpha 2
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Hey guys, I tried to upgrade to the alpha 2 of Android N using twrp recovery. I did a back up of my system then pressed the install button. I selected the Android N/aosp_taoshan-ota-eng.agentfabolous_1309_b4.zip on my external sd card. Then I encountered ths error
" E: unknown command
E: Error executing updater binary in zip '/external_sd/Android N/aosp_taoshan-ota-eng.agentfabolous_1309_b4.zip"
Error flashing
Please help
Why do you want to flash a complete new ROM CM --> AOSP and a complete new Android version 6.0.1 --> 7.0 without wiping anything? There shouldn't be a problem of you wipe /system, /data, /cache and /dalvik cache and flash the ROM after that.