About EPC2BPMN transformation

Dears,

Our company use the Aris SOA Architect 7.2 to manage the process flow(EPC), then we convert it to BPMN and export to XPDL files.

But as we used some customized objects in EPC, there are some errors during BPMN convert.

Who can tell me how to define a EPC2BPMN transform or supply some materials to help re-define the EPC2BPMN transform?

Especially for the EPC Lane, how to define it in EPC2BPMN and what kind of BPMN objects we can mapping?

Thanks