SOAP Response returning NULL

I'm doing communication with a webservice SOAP, through the IDE I can execute the method calls and capture the values perfectly, however, when running .jar generated by IntelliJ, all returns are null ... I've already tried to generate .jar by maven, I have no idea what it might be ...

Example of one of the methods I'm using:

    @WebMethod(operationName = "InserirVenda", action = "Linker20/InserirVenda")
@WebResult(name = "InserirVendaResponse", targetNamespace = "Linker20", partName = "parameters")
public InserirVendaResponse inserirVenda(
        @WebParam(name = "InserirVenda", targetNamespace = "Linker20", partName = "parameters")
                InserirVenda parameters);