Simulink-dll: Discrete integrator does not update on RT target

[Lysandros]

Hello, 

I compiled a simple .dll-file of a Simulink model and deployed it on the PXI Real Time target. With the help of the Model Interface Toolkit VIs I can set imports, update the model and real the outports. However the discrete integrator block of the simulink model does not seem to update; it only retains the initial condition value but doesn't change at all. I tried to emulate the integrator function with a memory and a feedback loop, but still no change. Is this a bug?

P.S. all other simulink blocks, like gain, math functions et.c. work normally.

Best regards,

Lysandros