Hi Robert,

We have a couple of similar reports but it's hard to replicate. For example, our live demo server does not have an issue. Do you think it's because of high load or because of specific document files? The problem is it's hard to catch exceptions from native DLL, unlike managed DLLs it crashes down the owner process when it faults.

I suspect the fault mostly occurs when converting specific documents to XPZ format in second step. Converting to PDF in first step is usually stable. We are currently working on new viewer which will not need XPZ format and will display PDF format directly. I think this will solve most of the weird native crashes. Later, we will also try to ditch native DLL and go full managed. The new version is very close to completion, I will let you know soon.