How do switch on/off forward sensitivity computations in CVODES?
If you want to turn on and off forward sensitivity calculations during several successive integrations (such as if you were using CVODES within a dynamically-constrained optimization loop, when sometimes you want to only integrate the states and sometimes you also need sensitivities computed), it is most efficient to use CVodeSensToggleOff. Sensitivity calculations are enabled by the following functions: CVodeSensMalloc and CVodeSensReInit and are disabled by CVodeSensFree (after calling this one, they can be re-enabled only by calling CVodeSensMalloc) and CVodeSensToggleOff.
