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Summary: Zoom tool causes crash

Issue# Type Category Severity Status
208 Bug Graphics
Fix In Progress


The magnifying glass tool causes the program to crash upon hovering over the canvas if it is the first tool used in that instance. Other means of zooming (View menu, zoom in the status bar, keyboard shortcut, mouse wheel) work with no crash.

The crash message is "Object reference not set to an instance of an object."

This only affects the zoom tool (I was unable to reproduce with others). This no longer occurs once you have performed another operation on the canvas such as drawing with another tool, clicking with the hand tool, and so on.

Steps to Reproduce

1. Open a fresh instance of NPS
2. Choose zoom tool under hand if it's not already selected
3. Move mouse over the canvas
4. See the crash!


(none specified)

Timing Information

Entered Closed Age
4/6/2018 07:42 PM CST 4/11/2018 03:07 AM CST 4 days

Additional Information

Reported Version Operating System Architecture Fixed Version
3.1.12806.1 Windows 10 x64 .NET Not fixed