ID:14866 Found illegal characters in the output file name. File names can contain only underscore, tilde, and alphanumeric characters.
CAUSE: The Quartus Prime software found illegal characters in the output file name. File names can contain only underscore, tilde, and alphanumeric characters.
ACTION: Click OK to close the message dialog box, and then specify an output file name that contains only underscore, tilde, and alphanumeric characters.