
#include nagmk26.h

On entry,  ${\mathbf{m}}<1$, 
or  ${\mathbf{neq}}<1$, 
or  ${\mathbf{ldysav}}<1$, 
or  ${\mathbf{neq}}>{\mathbf{ldysav}}$, 
or  ${\mathbf{m}}>{\mathbf{neq}}$, 
or  ${\mathbf{nqu}}<1$, 
or  ${\mathbf{sdysav}}<{\mathbf{nqu}}+1$, 
or  the BDF integrator was not previously used, 
or  the Petzold error test, if applicable, was used. 