In maven multibranch project , while doing incremental build on the project , the build i sgood but the running sonar on top of that is not working fine.

[ERROR] Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin:3.6.0.1398:sonar (default-cli) on project XXXXX: Maven session does not declare a top level project -> [Help 1]

Project Structure:

Parent:

     ->pom.xml (having 2 modules - ModuleA and ModuleB)

         ModuleA

               -->pom.xml

        ModuleB

              --> pom.xml

now i have tried incremental build so the command that gets executed for clean install is 

pom.xml -amd -pl com.root.app:ModuleA clean install

but when i try to run pom.xml -amd -pl com.root.app:ModuleA sonar:sonar

it fails saying  Maven session does not declare a top level project -> [Help 1]
[ERROR].

How can i do sonar on incremental maven build.