Bug? PLEASE help guys

Hi guys,

I'm a Noob, so really need your help.

Getting this error message when I compile:

B4A version: 5.20
Parsing code. (0.04s)
Compiling code. (0.11s)
Compiling layouts code. (0.00s)
Generating R file. (0.04s)
Compiling generated Java code. (0.69s)
Convert byte code - optimized dex. Error

UNEXPECTED TOP-LEVEL EXCEPTION:

java.lang.IllegalArgumentException: already added: Lanywheresoftware/b4a/objects/preferenceactivity$B4APreference;

at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:122)
at com.android.dx.dex.file.DexFile.add(DexFile.java:161)
at com.android.dx.command.dexer.Main.processClass(Main.java:732)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
at com.android.dx.command.dexer.Main.access$300(Main.java:83)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
at com.android.dx.command.dexer.Main.processOne(Main.java:632)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:510)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:280)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)

THANK YOU SO MUCH!!

Without seeing our code it is nearly impossible to help.

Export yopur project as zip (ide -> File -> Export as zip) and upload it here

Note that the thread title should summarize the question or issue. Otherwise this thread will never help any other member.

My guess is that you are referencing both PreferenceActivity and AHPreferenceActivity libraries.