Emphasis mine:
Name - Name of the asset, f.i. "EUR/USD". Up to 15 characters, case sensitive, with no blanks and no special characters except for slash '/' and underline '_'. This name is used in the script and in the Asset scrollbox; it can be different to the symbol used by the broker. The asset is ignored when the name begins with a hash character "#".
If the t6 filename does not match your asset Name, it is not valid. Thus, it must meet the above criteria.
If your broker requires a dot, it is supported, so you put it in the symbol column. That's the problem being solved.
