Our code uses com.aspose.slides.ISlideCollection#addClone(com.aspose.slides.ISlide) to merge multiple pptx files, and then uses com.aspose.slides.Presentation#save(java.lang.String, int) to save the merged file. This log…...filesystem-related issues (file handles, disk space, network filesystem...there will be a concrete I/O exception, or it will become clear that...