What to do if simulink detects nonexistant algebraic loops

What can you do, if simulink detects an algebraic loop that simply does not exist? I tried every combination of atomic subsystems and minimize algebraic loop occurences that I could think of. I have a subsystem that has as outputs the outputs of 2 integrators. I have one input. If I feed the input directly into the integrators I don't get an algebraic loop. If I multiply the input with other values that are calculated in the subsystem then I get an algebraic loop. Normally the factors would depend on other inputs. But I have disabled that and replaced all other inputs by constants. Still if I multiply I get an algabraic loop, if I don't all is well for simulink.

The detection is simply wrong. I can simulate with fixed stepsize. But if I simulate with variable stepsize the solver crashes due to minimum stepsize reached.

[Fangjun Jiang]

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