Answer posted by Dan Letecky [DayPilot] 10 years ago.
As far as I can tell you can get this error if you create a DLL in C++ and use it in a C#/VB project and the functions are not exported properly. However, this is not the case of DayPilot which is written in C#. I have never seen this error before.
What version is the DLL? Is it possible that the file is corrupted?
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