MatCont
Numerical Bifurcation Analysis Toolbox in Matlab
..., and W. Govaerts, Yu.A. Kuznetsov, H.G.E. Meijer and B. Sautois, MCMDS 2008, Vol. 14, No. 2, pp 147-175
In case you're stuck, use the forum, but to get a good answer provide:
1. What command do you give when this appears? Provide the exact steps. Stating "no convergence" is not enough.
2. Most procedures are explained in the Tutorials. There is a manual with detailed descriptions of the data.