What s the meaning of this error in matlab?

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fatemeh hosseini
fatemeh hosseini 2015-11-28
回答： Minjun Bae 2020-3-5
Hi
I have a problem in solving 3 coupled equation that i used MOL to solve them.These are equations
and initial condition are zero for all equations.
i descritized equations in radius and lenght and convert them to a system of odes.but an error accured in MATLAB.
THIS IS THE ERROR:
Error using daeic3 (line 132)
This DAE appears to be of index greater than 1.
Error in ode15s (line 313)
[y,yp,f0,dfdy,nFE,nPD,Jfac,dMfac] = daeic3(odeFcn,odeArgs,tspan,htry,Mtype,Mt,Mfun,...
Error in massmain (line 47)
[t,y]=ode15s(@massfunc,t,y,options)
I attached my program.
i cant run this program for a month.
please help me.
thanks.

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回答（3 个）

Walter Roberson
Walter Roberson 2015-11-28
Leon Heile
Leon Heile 2018-11-13
solutions? have the exact same problem
Minjun Bae
Minjun Bae 2020-3-5
Hi, have you handled this issue?
I am trying to use PDE toolbox, and have the exact same problem. ;(

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