Edge indices must be positive integers not greater than the number of edges in the graph ({0}). Graph does not contain node names. Graph does not contain a node named ''{0}''. Node IDs must both be numeric or both be node names. Too many output arguments. When called with 3 input arguments, findedge returns one output argument. Must use two outputs with this syntax. Not enough input arguments. Edge indices must be numeric. Edge indices must be real.