Can not solve DAE! Problems with good initial values

Hello guys!
I am unexperienced in Matlab and I am struggling a lot with solving my codes with DAE system. Most of the time the warning comes:
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In ode15s (line 589)
In AKANmainmodell (line 22)
Warning: Failure at t=0.000000e+00. Unable to meet integration tolerances without reducing the step size below the smallest value allowed (7.905050e-323)
at time t.
> In ode15s (line 668)
In AKANmainmodell (line 22)
Elapsed time is 10.638367 seconds.
I think my initial values are wrong, since also sometimes I got received that error stating to choose better guess for initial value .
Here is a download link:

回答(1 个)

Hi Akan,
Refer to the following link for solving DAEs using MATLAB.
You can also find the solution to the issue you are facing in the answer posted here

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