java.lang.NullPointerException: Cannot invoke "jadx.gui.settings.data.ProjectData.getMappingsPath()" because "this.data" is null

[R-Krishna-F1]

Please describe what you did before the error occurred.

IMPORTANT! If the error occurs with a specific APK file please attach or provide link to apk file!

• Jadx version: 1.5.4
• Java version: 21.0.10
• Java VM: Debian OpenJDK 64-Bit Server VM
• Platform: Linux (6.18.9+kali-amd64 amd64)
• Max heap size: 8192 MB
• Program args: -Xms128M -XX:MaxRAMPercentage=70.0 -Dawt.useSystemAAFontSettings=lcd -Dswing.aatext=true -Djava.util.Arrays.useLegacyMergeSort=true -Djdk.util.zip.disableZip64ExtraFieldValidation=true -XX:+IgnoreUnrecognizedVMOptions --add-opens=java.base/java.lang=ALL-UNNAMED --enable-native-access=ALL-UNNAMED -Dsun.java2d.noddraw=true -Dsun.java2d.d3d=false -Dsun.java2d.ddforcevram=true -Dsun.java2d.ddblit=false -Dswing.useflipBufferStrategy=true -Djadx.launchScript.path=/home/krishna/jadx-new/bin/jadx-gui -Xms2G -Xmx8G

java.lang.NullPointerException: Cannot invoke "jadx.gui.settings.data.ProjectData.getMappingsPath()" because "this.data" is null
	at jadx.gui.settings.JadxProject.getMappingsPath(JadxProject.java:176)
	at jadx.gui.plugins.mappings.RenameMappingsGui.onUpdate(RenameMappingsGui.java:126)
	at jadx.gui.ui.MainWindow.update(MainWindow.java:752)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	at jadx.gui.ui.JadxEventQueue.dispatchEvent(JadxEventQueue.java:29)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[skylot]

@R-Krishna-F1 thanks for report.
Although, I don't know what cause this issue and how to reproduce it.
It will be very helpful if you provide additional info:

• what you do to make this error appear?
• maybe you know steps to reproduce this issue
• do any other errors or warnings appear in log before this issue?

[R-Krishna-F1]

1. I have been working on a specific APK for a long time using JADX GUI (version 1.5.3 recently updated it to 1.5.4 yesterday). 2. During this time, I added multiple custom code comments to various classes. 3. I attempted to open the app or reload the project. 4. The application crashed with java.lang.NullPointerException at jadx.gui.settings.JadxProject.getMappingsPath. - I have a large amount of saved metadata (comments) in this project. - It seems the error occurs when the decompiler tries to resolve mapping paths or project settings for an existing session with significant user-added content. - The error occurred after the update to my best knowledge

…

On Thu, 19 Feb 2026 at 00:06, skylot ***@***.***> wrote: *skylot* left a comment (skylot/jadx#2794) <#2794 (comment)> @R-Krishna-F1 <https://github.com/R-Krishna-F1> thanks for report. Although, I don't know what cause this issue and how to reproduce it. It will be very helpful if you provide additional info: - what you do to make this error appear? - maybe you know steps to reproduce this issue - do any other errors or warnings appear in log before this issue? — Reply to this email directly, view it on GitHub <#2794 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BWWAOSMTU4TJDTUMWTRCCD34MSWJZAVCNFSM6AAAAACVSR6INOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSMRSGQ4DKNRVG4> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[skylot]

This issue might be fixed in latest 1.5.5 release, if not, feel free to open a new issue.