Assertion: converted string to double failed at...

Last Published: April 25, 2020

Error Message

This error occurs when opening a project file:

"Assertion: converted string to double failed at line ...."


A view in the project has a scale so small that it can not be accommodated by the hardware's precision capabilities.

Solution or Workaround

  1. Open the APR file in text editor such as Notepad or WordPad
  2. Search and replace all occurrences of the text "NaN" or "NaNQ" with 0.000000000
  3. Save the file with a new name. This new project should open in ArcView.

Article ID:000002641

  • Legacy Products

Receive notifications and find solutions for new or common issues

Get summarized answers and video solutions from our new AI chatbot.

Download the Esri Support App

Discover more on this topic

Get help from ArcGIS experts

Contact technical support

Download the Esri Support App

Go to download options