Installation error: Unknown reason -18

firelightguitarist

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Nov 29, 2010
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ok everyone, i was about to start a thread asking for help to fix this error, but then i found this right here on the android central forums:

http://forum.androidcentral.com/htc-evo-4g/57409-market-updates-problem-unknown-error-18-a.html

it's for the evo 4g, but it works perfectly. i wish i'd found this a few days ago when this all started, i could've saved several hours of work flashing, reflashing, restoring, returning to stock, and flashing some more.

so! if you also have this problem, check out the forum post i listed above and enjoy updating your apps!

UPDATE:
Instructions! Just 4 easy steps! (you must be rooted to do it without a computer. for computer instructions, see the link to the evo forum post above)

1. (if you don't have it already) get the app "adao file manager"
screenshot_14.png


2. open adao file manager
screenshot_1.png

screenshot_7.png

screenshot_8.png


3. open "sd card" and navigate to ".android_secure"
screenshot_11.png


4. delete "smdl2tmp1.asec" (obviously, since i have done it already, my directory is empty)
screenshot_11.png
 
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johnacc2011

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Jan 25, 2011
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I will try this out although why is it that my phone is alright for a few weeks and then acts up like "I'd like to make it a paperweight" I mean HTC EVO 4g, w/2.2 Froyo? What's actually causing this to happen? HTC firmware, Sprint URL update, Droid Marketplace out of sync? I copied the apps asking to be updated back to my phone and the apps updated OK. I have not tried to copy them back to SD card however. I tried downloading a new app and it failed also with a "Installation error, Unknown reason - 18". Thanks.
 
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Titus37

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Jan 3, 2011
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Thanks a lot for that link! I started getting the unknown error -18 last night. My phone has seemed a lot less stable since I accepted the latest OTA update. I have not hacked my phone at all and am running stock everything, but problems like this make me think that potential bugs within the custom ROMs can't be much worse. :D
 

VW Maverick

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Dec 3, 2010
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Per that other link, here are the steps:

Step 1 - Move all apps to internal memory from card
Step 2 - Delete android_secure file on the SD
Step 3 - Move all apps back to SD as you please, and everything will update fine.


Step 1 - Completed
Step 2 - I am sure I am missing something easy, but where/how can I access my SD card to be able to delete the file?

Thanks.

Mav. :cool:
 

firelightguitarist

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Nov 29, 2010
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I am sure I am missing something easy, but where/how can I access my SD card to be able to delete the file?

I prefer Adao File Manager. Just navigate to it with that and delete it. That's what I did.

BTW, there's absolutely no need to move your apps like that. all you have to do is delete the file. i'll edit my OP with instructions, maybe even screenshots
 

MaXXimus

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Jan 6, 2011
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And what if that file isn't in the android secure folder? I still get app update errors.

Swyped from my LS670 using Tapatalk
 

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