Exporting a PDF will always append to the existing PDF instead overwriting it, even when 'Overwrite Existing' is chosen as the option. The PDF export is acting like Append to Existing is the option, when 'Overwrite Existing' is set.
1. 'File-->Export-->PDF'.
2. Set 'Action' to 'Overwrite Existing'.
3. Select the existing PDF to overwrite.
4. Export the PDF file.
When the PDF file is opened, the export was appended to the existing .pdf file instead of overwriting it.
Make sure the following environment variable is not set: UGII_PDF_APPEND=1
If this is set, then all PDFs will get appended, not overwritten.
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