Hi everyone, I have a maven multi module project and I’m trying to scan it with sonarqube-8.3.1.34397 but in vain, it throws this ERROR, can anyone help me please? Thank you in advance 
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[DEBUG] 17:06:46.118 'modules/extraction-interfaces/com.bsb.solife.migration-ul/src/main/java/com/lombard/policymigration/allocate/AllocateServiceMigration.java' generated metadata with charset 'UTF-8'
[ERROR] 17:06:49.275 Unable to run check class org.sonar.samples.java.checks.BasicStrcutDataAddRuleCheck - PLM-102 on file 'modules/extraction-interfaces/com.bsb.solife.migration-ul/src/main/java/com/lombard/policymigration/allocate/AllocateServiceMigration.java', To help improve the SonarSource Java Analyzer, please report this problem to SonarSource: see https://community.sonarsource.com/
java.lang.ClassCastException: null
[DEBUG] 17:06:49.278 'modules/extraction-interfaces/com.bsb.solife.migration-ul/src/main/java/com/bsb/is/migration/policy/coverage/ReserveService.java' generated metadata with charset 'UTF-8'
[DEBUG] 17:06:51.371 Could not complete symbolic execution:
org.sonar.java.se.ExplodedGraphWalker$MaximumStepsReachedException: reached limit of 16000 steps for method migrate#57 in class ReserveService
at org.sonar.java.se.ExplodedGraphWalker.throwMaxSteps(ExplodedGraphWalker.java:308)
at org.sonar.java.se.ExplodedGraphWalker.execute(ExplodedGraphWalker.java:247)
at org.sonar.java.se.ExplodedGraphWalker.visitMethod(ExplodedGraphWalker.java:220)
at org.sonar.java.se.SymbolicExecutionVisitor.execute(SymbolicExecutionVisitor.java:73)
at org.sonar.java.se.SymbolicExecutionVisitor.visitNode(SymbolicExecutionVisitor.java:63)
at org.sonar.java.ast.visitors.SubscriptionVisitor.visit(SubscriptionVisitor.java:103)
at org.sonar.java.ast.visitors.SubscriptionVisitor.visitChildren(SubscriptionVisitor.java:128)
at org.sonar.java.ast.visitors.SubscriptionVisitor.visit(SubscriptionVisitor.java:105)
at org.sonar.java.ast.visitors.SubscriptionVisitor.visitChildren(SubscriptionVisitor.java:128)
at org.sonar.java.ast.visitors.SubscriptionVisitor.visit(SubscriptionVisitor.java:105)
at org.sonar.java.ast.visitors.SubscriptionVisitor.scanTree(SubscriptionVisitor.java:86)
at org.sonar.java.ast.visitors.SubscriptionVisitor.scanFile(SubscriptionVisitor.java:72)
at org.sonar.java.se.SymbolicExecutionVisitor.scanFile(SymbolicExecutionVisitor.java:53)
at org.sonar.java.model.VisitorsBridge.lambda$runScanner$0(VisitorsBridge.java:167)
at org.sonar.java.model.VisitorsBridge.runScanner(VisitorsBridge.java:172)
at org.sonar.java.model.VisitorsBridge.runScanner(VisitorsBridge.java:167)
at org.sonar.java.model.VisitorsBridge.visitFile(VisitorsBridge.java:138)
at org.sonar.java.ast.JavaAstScanner.simpleScan(JavaAstScanner.java:98)
at org.sonar.java.ast.JavaAstScanner.scan(JavaAstScanner.java:64)
at org.sonar.java.JavaSquid.scanSources(JavaSquid.java:119)
at org.sonar.java.JavaSquid.scan(JavaSquid.java:112)
at org.sonar.plugins.java.JavaSquidSensor.execute(JavaSquidSensor.java:101)
at org.sonar.scanner.sensor.AbstractSensorWrapper.analyse(AbstractSensorWrapper.java:48)
at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:85)
at org.sonar.scanner.sensor.ModuleSensorsExecutor.lambda$execute$1(ModuleSensorsExecutor.java:59)
at org.sonar.scanner.sensor.ModuleSensorsExecutor.withModuleStrategy(ModuleSensorsExecutor.java:77)
at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:59)
at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:82)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:137)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:123)
at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:386)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:382)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:379)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:379)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:379)
at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:351)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:137)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:123)
at org.sonar.scanner.bootstrap.GlobalContainer.doAfterStart(GlobalContainer.java:141)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:137)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:123)
at org.sonar.batch.bootstrapper.Batch.doExecute(Batch.java:72)
at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:66)
at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
at com.sun.proxy.$Proxy23.execute(Unknown Source)
at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:189)
at org.sonarsource.scanner.api.EmbeddedScanner.execute(EmbeddedScanner.java:138)
at org.sonarsource.scanner.maven.bootstrap.ScannerBootstrapper.execute(ScannerBootstrapper.java:65)
at org.sonarsource.scanner.maven.SonarQubeMojo.execute(SonarQubeMojo.java:108)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)