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Originally posted by: Tim MeagherThis error occurs on the Delimited File and CSV File nodes if the node does not have any inputs, and the "File" parameter is not set.
If the node takes no inputs, you need to specify the name of the file in the "File" parameter.
If you want to process a series of files, you need to provide the information about the files to process via an input to the node, and specify how to locate the files based on the data in the input using the FilenameExpr parameter.