In chem sketcher, trying to draw with the custom element tool results in exception.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Image Acquisition Dialogue -> Chem Sketch -> Select the tool with 'E' icon
2. Click the canvas and type something to be a custom element, e.g. 'Et'
3. Now with the same tool, click on Et and drag a bond outward. Release the 
mouse.

What is the expected output? What do you see instead?
It is expected that a new bond should be created. Instead, an exception is 
thrown, and chem sketcher is unresponsive.

Original issue reported on code.google.com by tom.eve...@gmail.com on 30 Jul 2010 at 2:10

[GoogleCodeExporter]

Fixed in revision f4df891cfc.

The new behaviour of the tool is that an atom labelled as "?" is added via a
single bond as per the user's drag motion. The user can then click this atom
immediately to edit its label.

Original comment by tom.eve...@gmail.com on 31 Jan 2011 at 6:48

• Changed state: Fixed