ArcMap closes when using the Circle Tool

Description

Clicking 'R' on the keyboard to input a radius when using the Circle Tool closes ArcMap.

Cause

This is a known issue. Clicking 'R' before clicking on the screen causes ArcMap to close.

Workaround

1. Click the Circle Tool from the Advanced Editing Toolbar.
2. Click on the screen to locate the center of the new circle.
3. Click the 'R' key to open the Radius dialog.
4. Enter a radius value and click Enter.