<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello,<div class=""><br class=""></div><div class="">I have a collection of Aperio whole slide images of digital pathology. None of them was successfully read using OpenSlide C API functions. </div><div class=""><br class=""></div><div class="">For example, with <span style="color: rgb(88, 126, 168); font-family: Menlo; font-size: 11px;" class="">openslide_get_level_count()</span> I only get -1 for layer count indicating that the reading was not right.</div><div class=""><br class=""></div><div class="">However, ALL of them can be opened using Aperio ImageScope without any problem.</div><div class=""><br class=""></div><div class="">Please help!!!!</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>