Which of these is not an Alert message type?

In the context of alert message types within software like Siemens NX, each type signifies a different level of importance regarding the information being conveyed to the user.

"Info" messages provide general information without indicating any risk, while "Warning" messages serve as a precaution about potential issues that may arise. "Error" messages indicate a significant problem that prevents the software from functioning as intended, requiring immediate attention from the user.

The term "Caution," while it may suggest a warning or need for careful attention, is not typically used to classify alert messages in software interfaces like Siemens NX. The standard classifications focus on "Info," "Warning," and "Error," reflecting varying degrees of urgency and severity.

Thus, recognizing that "Caution" is not part of this established classification helps to clarify the differences and allows users to better understand the nature of alerts they may encounter in using the program.