Message 17
Message
""file name extension" is not a valid extension for "this". Using extension ""default extension"".
Where, the italicized text represents text that varies based on the situation that caused the message.
Description
Indicates an invalid extension file name extension was specified. The default extension will be used instead. For example, "image.exe" is an invalid name for a .png graphics file.
This message is displayed in the message area and is reported as a programming error message.