Simon
The format code %*tl is not available for third-party compilers. An improved error report has been added to make this clear.
The peeking process can't handle a case where one argument (apart from the initial string) determines how many arguments follow. That would require a peek into a peek.
The format code %*tl is acceptable ( is included in the latest download) because the argument list of tab values is replaced by a single array (so it doesn't depend on the value supplied by the *).