Hello, I'm reading a pptx file and adding some slides but it allways gets corrupted and powerpoint asks to repair it and it gets repaired successfully. Even adding a blank slide it shows the error I attach the corrupted file generated by PHPPresentation and the same file repaired by PowerPoint What can i do to fix that? Thanks a lot! [pptfileREPAIRED.pptx](https://github.com/PHPOffice/PHPPresentation/files/529520/pptfileREPAIRED.pptx) [pptfileERROR.pptx](https://github.com/PHPOffice/PHPPresentation/files/529521/pptfileERROR.pptx) ##