error message using PDEPE

hi, does anyone knows what this error means:

??? Error using ==> daeic12 at 77 This DAE appears to be of index greater than 1.

Error in ==> ode15s at 389 [y,yp,f0,dfdy,nFE,nPD,Jfac] = daeic12(odeFcn,odeArgs,t,ICtype,Mt,y,yp0,f0,...

thanks, Bar

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/102944