Error "Wrong content node response type" or report preview & task failures

    The error message "Wrong content node response type" and other report failures can be caused by invalid applied filters or a cycle that try to select an invalid value for the field (a value that doesn't exist in the field).


    Note: By default, 'verify filter' is enforced programatically in NPrinting 17.x.x.x meaning that if a filter produces empty values in a chart, a report will not be produced and the error you will see is 'Wrong Content Node Type error'.


    Example 1:

    Your source contain the Year field that contains the values 2012, 2013 and 2014 but you added a filter with Year = 2015 to the report that results in an empty data set.


    Example 2:

    You added to the report the filter Year = 2014 and the Country field into the Levels node. Remember that adding a field in the Levels node is like a filter. When the report is created it is possible that a value of Country has an empty data set for the year selected. For example, there are not sales in Italy in 2014. This generates the error.


    End result: NPrinting may deliver a message to the end user as follows (assuming email is enabled)

    "Some errors occurred during report generation

    Number of reports not generated: 1"