What does the ACER XML error message "the filename is missing" mean?

What does the ACER XML error message "the filename is missing" mean?

In the case you receive an error message "The document is invalid... Errors: the filename is missing" with the technical receipt below:

<technicalReceipt>
            <reportedFilename>*unknown*</reportedFilename>                       
            <status>Rejected_Technical</status>
            <errorCode>INVALID_FILENAME</errorCode>
            <errorDetails>The filename is missing.</errorDetails>
            <comment>Rejected by eRR.</comment>
</technicalReceipt>

this error indicates there is a property missing in your Messenger which is needed for the successful sending of ACER XML files.

You will need to add the property "ponton.ebxml2.include.processing.directives=true" to the lib_ext folder in your installation directory <PontonXP_Install_DIRECTORY>/xmlpipe/lib_ext/ponton-messenger-custom.properties.