[SOLVED] Execution failed for task ':app:compileDebugJavaWithJavac' java.lang.IllegalArgumentException: expected type but was null [UpperCamelCase not documented]]

DBFlow Version: 3.1.1 or develop snapshot

Bug

Description:

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ‘:app:compileDebugJavaWithJavac’.

  java.lang.IllegalArgumentException: expected type but was null

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'.
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
    at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
    at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:66)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
    at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
    at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: expected type but was null
    at com.sun.tools.javac.main.Main.compile(Main.java:553)
    at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
    at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:46)
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:33)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:104)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:53)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:38)
    at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:35)
    at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25)
    at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:163)
    at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:145)
    at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:93)
    at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:49)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:245)
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221)
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:232)
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
    ... 14 more
Caused by: java.lang.IllegalArgumentException: expected type but was null
    at com.squareup.javapoet.CodeBlock$Builder.argToType(CodeBlock.java:225)
    at com.squareup.javapoet.CodeBlock$Builder.add(CodeBlock.java:176)
    at com.squareup.javapoet.CodeBlock.of(CodeBlock.java:94)
    at com.squareup.javapoet.FieldSpec$Builder.initializer(FieldSpec.java:157)
    at com.raizlabs.android.dbflow.processor.definition.column.ColumnDefinition.addPropertyDefinition(ColumnDefinition.java:256)
    at com.raizlabs.android.dbflow.processor.definition.TableDefinition.onWriteDefinition(TableDefinition.java:487)
    at com.raizlabs.android.dbflow.processor.definition.BaseDefinition.getTypeSpec(BaseDefinition.java:131)
    at com.raizlabs.android.dbflow.processor.utils.WriterUtils.writeBaseDefinition(WriterUtils.java:17)
    at com.raizlabs.android.dbflow.processor.model.ProcessorManager.handle(ProcessorManager.java:338)
    at com.raizlabs.android.dbflow.processor.DBFlowProcessor.process(DBFlowProcessor.java:98)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176)
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170)
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856)
    at com.sun.tools.javac.main.Main.compile(Main.java:523)
    ... 34 more


BUILD FAILED

I have tried EVERYTHING, nothing fixes it, my main app won’t compile, made new test app with bare minimum, the same error, newest stable android studio

my gradle

apply plugin: 'com.android.application'

apply plugin: 'com.neenbedankt.android-apt'

def dbflow_version = "develop-SNAPSHOT"; //"3.1.1"

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.1"


        defaultConfig {
        applicationId "app.sample.dbflowtest"
        minSdkVersion 15
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        incremental = false
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:24.2.0'

    apt "com.github.Raizlabs.DBFlow:dbflow-processor:${dbflow_version}"
    compile "com.github.Raizlabs.DBFlow:dbflow-core:${dbflow_version}"
    compile "com.github.Raizlabs.DBFlow:dbflow:${dbflow_version}"
}

It works with only database configured, but as soon as i add any model configuration with annotations it won’t compile with that error, even a bare simple one:

import com.raizlabs.android.dbflow.annotation.PrimaryKey;
import com.raizlabs.android.dbflow.annotation.Table;
import com.raizlabs.android.dbflow.structure.BaseModel;

@Table(database = AppDatabase.class)
public class entryArt extends BaseModel {

    @PrimaryKey
    public int id;
}

Anyone have an idea, i need this working asap?

[SheharyarEjaz]

Its smart answer is that there is some syntax error in your Code may be in Java file or xml. FIx them error will gone. work 100 percent for me every time

[anneonyejemuo]

you need to run androidstuio as an administrator- worked for me