The staff made various changes as a result of these conversations. In addition, the PC Magazine editors and I spent hours in phone conversations with Paul Lewicki, President of StatSoft, specifically checking the contents of the review. We changed several parts of the review so that it reflected his understanding of his product. We gave him essentially unlimited time to point out errors. In the published text, there are things that he would have not said.
Criticism is different from factual errors.
If factual errors remain, neither he nor anyone else on his staff pointed them out at the time. Vendors of software under review typically make two kinds of errors. They claim their package can do things that it can't. This is widely understood and usually attributed to the overstatements of a party with financial interests at stake. The cause here seems to be that modern full-featured software is complex and no one, not even the vendor, knows every detail.