Sorry, i forgot say that you should convert PPTX file to PDFA.
If i tried convert to PDF i received file with next error:
- Incorrect diagram in page 6. Missing line in diagram and text around diagram.
- When i am opening document in Abode Acrobat Reader i receiving error message: "An error exists on this page. Acrobat may not display the page correctly. Please contact the person who created the PDF document to correct the problem." When i try open document that you attached, i receive same error in Acrobat.
And when i try convert this PPTX file to PDFA, i get the error discribed in first post.