create callback in simulink model when block parameter is modified

I have a GUI, created by a .m-file, and a simulink model. The synchronisation of values between them (e.g. of a Gain value) is working fine in most cases. Therefore I use callbacks, set_param, RuntimeObject and so on. But so far I didn't find a way to update a value in the GUI when I simply change a model's block parameter (e.g. the Gain parameter within a Gain Block), when the simulation is STOPPED. Because the simulation is stopped, I cannot use RealtimeObject in this case. I could use the model's callback 'PostSaveFcn', but therefore I need to save the model. Is there a kind of 'Block parameter modified callback'? I know it's a detail...

[Kaustubha Govind]

Andi: This question has been asked before: http://www.mathworks.com/matlabcentral/answers/63039

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