The converter detected that one or more of the parameters that were passed to its main entry point do not have valid storage addresses to which the converter could refer and obtain the value.
Ensure that each parameter passed to the converter has a valid storage address unless a particular parameter can be null as defined by the converter call interface. For example, a null message address passed to the outbound converter will be interpreted as a request for the maximum outbound message size to be returned instead of performing a conversion.