I have a strange problem.
I want to simulate a model in which I use an external C-Code Dll in the OMConnection Environment. When I simulate the Model with a Simulationtime 0,1 s everything works fine and I can see and plot the results. Setting time at 1 s ends up in the following mistake:

[:0:0-0:0] Error: Fehler beim Lesen des Simulationsergebnisses C:/Users/KIE2QS005/Documents/Entwicklung/OpenModelica/R06SimTest/Simulation1_res.mat: Corrupt header: data_2 matrix

I don't understand this. My Code must be correct because it works with a time 0,1 s, but something about reading the results doesn't work when time is bigger.
The error occurs after the Simulationprogress is 100 percent, not at the beginning of the Simulation.
I use Windows 7 and OpenModelica 1.9.1.

Does anybody know what to do?