Hello Henrique
Well, my data set looks just great, if i load it from flat file with load table command, then i see no issues, data is loaded without even single warning in Sybase SQL, so therefore I do believe that the Super express version ( or how do they call it ?) of Sybase IQ has some limits and it cannot handle null values. And I must admit that this is very strange, because null can also be a part of set.
Yes, I'm using the latest release if PA, which is 11th I guess