I’m experimenting merging lots of files. The first thing I noticed is that when I want to merge selected pages of multiple presentations, the output presentation always has all pages of the first presentation, no matter which array of pages I use as input. I have now implemented a solution based on adding a blank presentation of one page in the beginning and at the end of merging, deleting this first page. The second issue I’m having is whenever I try to merge all pages of more than 5 presentations, I get an “Exception 500 GroupDocs.Merger.Exceptions.FileCorruptedException” when trying to remove the first page of the output presentation. I get this no matter which order of my test presentations I use. Is this a known issue?