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Home > Success Center > Network Performance Monitor (NPM) > Error when exporting NPM charts to Excel files (*.xls)

Error when exporting NPM charts to Excel files (*.xls)

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Created by Interspire Import, last modified by MindTouch on Jun 23, 2016

Views: 2,005 Votes: 0 Revisions: 14



While exporting the NPM charts to XLS the following error appears:

Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property. 
Parameter name: input



The maxJsonLength property value may not defined and also in the chart design 'INTERFACE TABLE' variables are used instead of 'INTERFACE TRAFFIC' variables



  1. Stop the SolarWinds Services - Starting / Stopping Orion Services.
  2. Go to your web directory “C:\Inetpub\SolarWinds\Orion\Services\”
  3. Edit the Web.config file
  4. Change the string “<jsonserialization>” to “<jsonserialization maxjsonlength="999999999">”,  where  ‘999999999’ = Absolute Max Value</jsonserialization></jsonserialization>
  5. Save the file.
  6. Start the SolarWinds Services - Starting / Stopping Orion Services.
  7. Also use 'INTERFACE TRAFFIC' variables in chart design  (create custom report choosing 'Historical - Interface Traffic')
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