What happens if no initial value is specified for a variable list?

When no initial value is specified for a variable list, the system prompts the user to select a value upon opening. This is designed to ensure that users actively engage with the variable from the start, making a conscious decision on its value rather than relying on predetermined defaults. This approach is particularly beneficial in dynamic environments where specific user input is essential for the correct functioning of the workbook.

Users are offered the chance to determine the variable's value based on their context or needs, thus enhancing flexibility and applicability. It directly supports scenarios where the initial default might not reflect the most relevant or appropriate option for every user and every situation. By requiring user interaction to choose a value, the workbook can better cater to varying needs and prevent potential misunderstandings that might arise from incorrect assumptions about defaults.

In contrast, other potential outcomes, such as the function of the workbook being impaired or the variable being unavailable, do not align with how variable lists are generally designed to handle situations lacking initial inputs.