Message in Spanish (Español)
El contrato requiere TwoWay (solicitud-respuesta o dúplex), pero el enlace '<var>X</var>' no lo admite o no está configurado correctamente para admitirlo.
Unlocalized message
Contract requires TwoWay (either request-reply or duplex), but Binding '<var>X</var>' doesn't support it or isn't configured properly to support it.
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