Could'nt have said it more precise myself...

You need, as detailed above, to create seperate processes for each simultanious burn.... The DLL does not, as of the version i had, support multiple burns in one process...

Seems to be some overall status registers that can't handle it, since multiple simultanous burns can start and will finish okay, but the DLL will throw an exception and your software will crash...

Try / Catch from C# won't work, since it is not the application that crashes, but the DLL thread...

I have written, how ever crude, an app. that does it as described above...

/FStampe