Hi Cedric,
Thanks for your help, I will prepare a reduced application.

Hi David,

I've updated to the latest GdPicture.NET 12.
The issue still remains.

Hi David, Thank you for your reply. I created a dummy image pdf to reproduce the error in my test environment. The same error occurred again. I duplicated 50 copies from this image pdf ( https://drive.google.com/file/d/0BxI_4nELtbyVS2w4NFZPZ0JWOU0/view?usp=sharing ), put them into a folder , let my ...

Hi David, Thank you for your reply. I'm sorry that I'm not able to provide the image PDFs, because they are confidential documents. Basically, these PDF files contain 300-800 pages scanned images, page size from A4-A3. Most of them are black and white, but some PDFs may have 10% of 24 bit color imag...

I'm doing bulk PDF to PDF OCR conversion by using GdPicture .NET sdk v12.0.57. My application does OCR one by one according to a predefined Image PDF file list. It is running on Windows Server 2008 R2, 2 x quad core processor, the OCR thread is 15. The application crashed after 40,000 pages OCR, and...