If you code an C# .NET application using axAcroPDFLib to generate a PDF document, shows it to the user, and found error message on your application at application closing like this (instruction and memory address may vary):
The instruction at "0x0700609c" referenced memory at "0x00000014". The memory could not be read
It was caused by Adobe Reader 9.x axAcroPDFLib bug. The axAcroPDF control doesn't disposed properly during form closing event.