Hello Walter, so it seems to be just like 3 years ago: The only place to get info is this list. But all information has to be collected in small bits because there is still no complete documentation available. By now we know that: - There are three integer types in AS, - plain (default) integer is longer than 16 bit - plain (default) integer may be shorter than 29 bit Is there any source at Apple to get a clear answer on the question: "Which file length can be addressed by the integer position parameter in read?" Regards Franz