The option to add a template is accessible
before the user selects a column. This results in this occasionally happening to me:
1. Create a chain and add a single-field action to it. Open the Settings dialog.
2. Click the Add Template button. Put something in there.
3. Edit the template window and then select a column. Note that it changes to Ask at Runtime. (Or, in my case, fail to notice.)
4. Click the OK button. (This is usually where I go test my chain and find out I've set it up wrong.)
5. Re-open the Settings dialog and check the template editor. It's now empty. (And with luck, the template is no longer saved in the tester!)
While a relatively minor issue, greying out the Add Template if there's no column selected would prevent it entirely.
Thanks