The chart name you specified cannot be used. You can use any character in a chart name except a colon (:), backslash (\), ...

The chart name you specified cannot be used. You can use any character in a chart name except a colon (:), backslash (\), vertical bar (|), less-than sign (<), greater-than sign (>), question mark (?), left or right square bracket ([  ]), or asterisk (*).