Expected and unexpected exceptions

So far, we have tried to program the process with the happy path in mind. For example, in the Weekly purchase of groceries process, we got the robot to read the shopping list, look for the item on the Amazon site, and added it to the shopping cart. As you ran the Weekly purchasing of groceries process (as above), did you encounter any exceptions?

Exceptions may be expected or unexpected. Sometimes, we are able to predict the kind of errors that the robot may encounter. Some examples of expected exceptions are as follows:

• The Add to Cart button is disabled. Amazon may not ship the product to the country in which you reside, or the product is out of stock, or perhaps the robot just does not understand the purchasing scheme of the product (for instance, you have to buy two items instead of one).
• The search was not able to locate the product.
• The...