MatCont
Numerical Bifurcation Analysis Toolbox in Matlab
...Please do us a favour and cite:
New features of the software MatCont for bifurcation analysis of dynamical systems. A. Dhooge, 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.