Project Automation API fails to load project with EntryAtomNonBiDi Not supported erro

Hi,

I am trying to load innstallanywhere project from JAVA application using Project Automation API using loadProject() call.
But, Load Project is failed with "EntryAtomNonBiDi" not supported error. I am able to open and build my product using GUI.
Can anyone tell me what is this error and how to get rid of it?

Error setting visual children for 'com.zerog.ia.installer.actions.ActionGroup'
com.zerog.ia.auto.project.ProjectAutomationException: The class 'com.zerog.ia.in
staller.util.EntryAtomNonBiDi' is not supported by the project automation API.
at com.zerog.ia.auto.project.file.ProjAutoObjectBuilder.create(ProjAutoO
bjectBuilder.java:136)
at com.zerog.ia.project.file.base.properties.IAPVectorBuilder.create(Unk
nown Source)
at com.zerog.ia.auto.project.file.ProjAutoObjectBuilder.create(ProjAutoO
bjectBuilder.java:159)
at com.zerog.ia.project.file.base.properties.IAPVectorBuilder.create(Unk
nown Source)
at com.zerog.ia.auto.project.file.ProjAutoObjectBuilder.create(ProjAutoO
bjectBuilder.java:159)
at com.zerog.ia.auto.project.file.ProjAutoIAPReaderImpl.loadInstaller(Pr
ojAutoIAPReaderImpl.java:39)
at com.zerog.ia.auto.project.ProjectAutomation.loadProject(ProjectAutoma
tion.java:115)
at com.abc.xyz.UnixBuild.BuildUpdate.Update(BuildUpdate.java:60)
at com.abc.xyz.UnixBuild.UnixBuildAuto.main(UnixBuildAuto.java:173)
Caused by: java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.zerog.ia.auto.project.file.ProjAutoObjectBuilder.create(ProjAutoO
bjectBuilder.java:131)
... 8 more