Gradle: The Filename, Directory Name, Or Volume Label Syntax Is Incorrect

I've installed and setup the latest version of Android Studio (0.3.6, nov 14 release) but upon trying to build my project (a bare-bones hello world project made with the Android St

Solution 1:

Finally solved it. I looked at the error message again and tried to run the last command before failure, e.g.:

C:\Android\android-studio2\sdk\build-tools\android-4.4\dx.bat --dex --ou
tput E:\Backups\etc\TestProj2\Test2\build\libs\Test2-defaultFlavor-debug.dex E:\
Backups\etc\TestProj2\Test2\build\classes\defaultFlavor\debug E:\Backups\etc\Tes
tProj2\Test2\build\dependency-cache\defaultFlavor\debug

This gave the "The filename, directory name, or volume label syntax is incorrect." So then I went to the build-tools folder and ran dx.bat with no cmd-line args:

C:\Android\android-studio2\sdk\build-tools\android-4.4\dx.bat

And still got the same error. So I took a look inside the file and found these lines:

rem Check we have a valid Java.exe in the path.set java_exe=
if exist    "%~dp0..\tools\lib\find_java.bat"call"%~dp0..\tools\lib\find_java.bat"if exist "%~dp0..\..\tools\lib\find_java.bat"call"%~dp0..\..\tools\lib\find_java.bat"ifnot defined java_exe goto :EOF

So I tried running find_java.bat from the command line and it returned nothing.

So I replaced the above lines with the below one:

set java_exe=C:\Windows\System32\java.exe

And everything started working...

Solution 2:

Here is my solution:

I got this error while running my React Native app:

java.io.IOException: The filename, directory name, or volume label syntax is incorrect.

That means you've got an issue in Gradle. Then I went to the build-tools folder and ran dx.bat with no cmd-line args

C:\Android\build-tools\30.0.1\dx.bat

(located in Sdk).

Open this file in notepad or any editor or IDE. Where you find this line of code below

rem Check we have a valid Java.exe in the path.
set java_exe=
if exist    "%~dp0..\tools\lib\find_java.bat" call    "%~dp0..\tools\lib\find_java.bat"
if exist "%~dp0..\..\tools\lib\find_java.bat" call "%~dp0..\..\tools\lib\find_java.bat"
if not defined java_exe goto :EOF

Replace this code with code below:

set java_exe= C:\Program Files\Java\jdk1.8.0_211\bin\java.exe

The location java.exe changed after the jre 8 update. java.exe is removed from c:\windows\system32 in jre 8.

I hope it's working now.