Only used for FitHugh-Nagumo problems. The optional parameter specifies the sparse matrix library that will perform the factorization and subsequent back-substitutions. The NAG routine is not included with the Continuity distribution. Write the factored GK matrix to factor. Read in the factored GK matrix from factor.
Times are in msec.
ERR specifies the error tolerance for adaptive time-step choice. All of the commands that would normally precede a solve integrate command must precede this command as well. Multiple in-at pairs may be specified. Enables or disables rendering of the solution. The display will be updated at each output time step.