Cross company transactions issue

Hi Experts,

There is an issue occurring during the inter company billing idoc. The idoc actually getting failed and giving out Message no.F5702.

Now my question is, is it possible for a inter company transaction to take place without OBYA settings. Is there any other way to establish a relationship between two company codes apart from OBYA. I can see, there is no OBYA setting in place between these two company codes.

Appreciate a quick response!

Regards

Partha