Error Message : ‘this._docMapSplitter’ is null or not an object.

Error Message

Java runtime error when debugging a project developed using ASP.net

Reason: Error message generally occurs due to size units with in the ReportViewer control.

Solution

 Solution:
1) Modify the ReportViewer control Height/Width to use “px” instead of percent
2) Do not set the Height and Width properties in the ReportViewer control.

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