[Amazfit] 1immortal:
ok ....

apearantly there's a dropbox folder under data\system that collects txt log files, and this is the latest one with the crash info in it:

Process: com.huami.watch.weeklysports
Flags: 0xc8be45
Package: com.huami.watch.weeklysports v22 (5.1-35)
Build: Huami/huanghe/watch:5.1/PACEfied/25:user/release-keys

java.lang.RuntimeException: Unable to instantiate application com.huami.watch.weeklysports.WeeklySportsApplications: java.lang.ClassNotFoundException: Didn't find class "com.huami.watch.weeklysports.WeeklySportsApplications" on path: DexPathList[[zip file "/system/app/WeeklySports/WeeklySports.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at android.app.LoadedApk.makeApplication(LoadedApk.java:563)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4526)
at android.app.ActivityThread.access$1500(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.huami.watch.weeklysports.WeeklySportsApplications" on path: DexPathList[[zip file "/system/app/WeeklySports/WeeklySports.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at android.app.Instrumentation.newApplication(Instrumentation.java:980)
at android.app.LoadedApk.makeApplication(LoadedApk.java:558)
... 10 more
Suppressed: java.io.IOException: Failed to open oat file from dex location '/system/app/WeeklySports/WeeklySports.apk'
at dalvik.system.DexFile.openDexFileNative(Native Method)
at dalvik.system.DexFile.openDexFile(DexFile.java:295)
at dalvik.system.DexFile.<init>(DexFile.java:80)
at dalvik.system.DexFile.<init>(DexFile.java:59)
at dalvik.system.DexPathList.loadDexFile(DexPathList.java:262)
at dalvik.system.DexPathList.makeDexElements(DexPathList.java:231)
at dalvik.system.DexPathList.<init>(DexPathList.java:109)
at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)
at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:65)
at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:57)
at android.app.LoadedApk.getClassLoader(LoadedApk.java:361)
at android.app.LoadedApk.makeApplication(LoadedApk.java:553)
... 10 more
Caused by: java.io.IOException: Failed to open oat file from /system/app/WeeklySports/mips/WeeklySports.odex (error ) (no dalvik_cache availible) and relocation failed.
... 22 more
Caused by: java.io.IOException:
... 22 more
Caused by: java.io.IOException: Failed to remove obsolete file from /data/dalvik-cache/mips/system@app@WeeklySports@WeeklySports.apk@classes.dex when searching for dex file /system/app/WeeklySports/WeeklySports.apk: Permission denied
... 22 more
Suppressed: java.lang.ClassNotFoundException: com.huami.watch.weeklysports.WeeklySportsApplications
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 13 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

now ... i've tried to add manually the dex file from rel 24, and i've changed it permissions to the relevant owner, but the group doesn't exist - all_a34 - so i cannot set the correct permissions.

FFS !!!