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Local Disk (Z:) appeared after building for android.

In 'This PC' there is a drive Z that has been mounted (I assume by the packaging process) and it is a mounted folder of my project directory's "Intermediate\Android\APK" .The drive Drive contents I also spotted a Y drive at some point but that isn't there anymore.

I cannot find a way of removing it. It doesn't show up in disk manager, 'diskpart' or 'subst'

Why is this there and how can I remove it?

Product Version: UE 4.16
zdrive.png (2.7 kB)
zdrive2.png (71.0 kB)
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asked Jul 21 '17 at 08:50 AM in Packaging & Deployment

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Hi, this is created with Subst and it's used to work around windows maximum path length problems with the Android SDK. It should be removed after the packaging is complete, but I just checked my machine and I also have a Y drive still subst'd. We'll look into that.

It is safe to use

subst z: /d

to remove it

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answered Jul 21 '17 at 09:30 AM

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avatar image KnightArchitects Jul 21 '17 at 09:35 AM

Thanks for the quick reply although I said that it doesn't show up in subst!

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zdrive3.png (2.9 kB)
avatar image JackP STAFF Jul 21 '17 at 09:41 AM

Apologies, we recently changed the method we use to create the path and I'm looking at 4.17. alt text

In any case I believe it should be removing the mapping; I've assigned another engineer who knows more about it to comment on that.

subst.jpg (11.6 kB)
avatar image Chris Babcock STAFF Jul 21 '17 at 05:08 PM

The replacement ant.bat removes the drive it used subst on after ant completes. If the batch file is interrupted it will not run the subst [drive letter] /d which can leave the drive mapped, but it should show up if you do a subst like Jack shows above.

Maybe it is a permissions issue; are you running as administrator? Also, which version of Windows? You could try putting the command in a batch file and right clicking on it to run as administrator and see if that works.

avatar image KnightArchitects Jul 24 '17 at 08:35 AM

I just fixed it! The problem was the fact that I was running as administrator. The drive must have been mapped on my user only and not for the whole system. So I just had to not use admin to make it work.

avatar image DEVARSH mavani Mar 24 '19 at 07:48 AM

hey i am also getting same problem what you exactly did to fix it . please can you help me?

avatar image DEVARSH mavani Mar 24 '19 at 07:53 AM

i am also getting same problem can you tell me how to fix it . please help. i tried as above screenshots but i don't know in which directory to go . whether in my project or ue4.20 directory . i am using unreal engine 4.20.

avatar image JackP STAFF Mar 25 '19 at 11:20 AM

Hi DEVARSH, the directory you're in when you enter the SUBST commands is not important. Just open a Windows Command Prompt and enter SUBST and it should show something like

Z:\: => E:\Projects\MyProject\Intermediate\Android\APK

If it shows that, you can remove the drive letter by using the command line


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