Mavenize Grails project not working in STS

I am using STS 3.6.1, Java 7, Grails 2.4.3.

When building a regular Grails project, it works well. However, my Grails project needs to depend on other java projects, so I am converting to a maven project. After that, STS request error

Could not find the grails dependency file. This probably means that there is a bad dependency in the pom file.
java.lang.Exception

      

        
        
        
      

    

Maven grails project can be built with grails command.

How to solve a problem? Or if there is a walk around to have a grails project depend on another Java project.