Hi e-iceblue Team!
I've encountered a similar problem like the one described in this thread:
http://www.e-iceblue.com/forum/viewtopic.php?f=6&t=3132&sid=8948cc300f2786abc60a64193ce77678
I'm using Spire.Doc 4.6.15. I'm creating a PDF document that contains 2 pages. The second one has a lot of place holders that are replaced with text by Spire.Doc (~800 place holders). The .doc version of this document works fine and is quick.
But if I try to create the document as a .pdf file after 20 minutes a StackOverflow exception is thrown while trying to save the file. The first part, the creation of the file and the replacing of the placeholders is also fast. The processor load is only 25 % and the memory is 40 % utilized during those 20 minutes.
Let me know if you need more information and I hope you can help us with this problem.
Thank you in advance!