Convert a VISIO 2013 file with 100 pages take more than one hour..

When I try to convert with PDFMaker a VISIO 2013 file with 100 pages is running usually in 5 minutes. But if one page greater than a specific size, for example A4, the creation of the 100 pages take more than one hour. It looks like that each page is printed one-by-one and not all 100 on one go.