ClassCastException : EndpointStrategyConfigImpl

Hi,

I create a SoapUI Project and it run on my computer.

I save my project and send it to other person.

When this person import project, there is an error :

An error of type Class.Cast.Exception :

java.lang.ClassCastException : Com.eviware.sopaui.config.impl.EndpointStrategyConfigImpl cannot be cast to com.eviware.soapui.config.DefautEndpointStrategyConfig

On my computer, I can upload the same project without error.

Will you have an idea ?

Thanks,