We have done SP2013 to the Online migration for a large custom document library having around 600k items. We are getting the error like "Properties can not be displayed having error: Error during serialization or deserialization using the JSON javaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property". As per my understanding, It is dependent on the number of columns/content types that the DocumentSet has. The properties pane tries to serialize this in a JSON in order to render the results and it is unable to do it. any help or any lead to resolving it much appreciated.

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1 Answer 1


Whether you have many lookup columns show in this list which exceed the recommended value?

If true,please refer to Brian Meeuwenberg's reply in this post, the suggested fix from Microsoft is to reduce the number of lookup columns.

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