Flat File Connection Issues

Issue: 404 Not Found Error occurs when drag and drop flat file


  • You get a 404 Not Found error when drag and drop a CSV or text or Excel file from Windows Explorer to the Explore window.
  • You get a 404 Not Found error when you manually create a data connector using the Flat File provider option and then go to select the flat file (CSV or other).


This problem may occur if your flat file exceeds the default upload file size limit which is around 500 MB. You can increase this limit by editing the following file from your Dundas BI website:


Increase the maxAllowedContentLength value which is measured in bytes. The maximum value you can enter is 4294967295.

See also

Dundas Data Visualization, Inc.
500-250 Ferrand Drive
Toronto, ON, Canada
M3C 3G8

North America: 1.800.463.1492
International: 1.416.467.5100

Dundas Support Hours: 7am-6pm, ET, Mon-Fri