Running examples in ‘nlsrk-Ex.R’ failed
The error most likely occurred in:

> ### Name: evrunge
> ### Title: Numerical Runge-Kutta Solver (multi point, multivariate)
> ### Aliases: evrunge
> ### Keywords: nonlinear
> 
> ### ** Examples
> 
> ##
> ##	example 1 : solving and plotting the system sys provided in the package
> ##
> data(syslin.don)
> syslin<-prepare(syslin.don)
>   evrunge(t=c(1:30),param=c(1,1),y0=c(1000,0),sys=sys,graph=TRUE)
Error in v == c(0, 1) || v == c(0) : 
  'length = 2' in coercion to 'logical(1)'
Calls: evrunge
Execution halted
Running examples in ‘nlsrk-Ex.R’ failed
The error most likely occurred in:

> ### Name: evrunge
> ### Title: Numerical Runge-Kutta Solver (multi point, multivariate)
> ### Aliases: evrunge
> ### Keywords: nonlinear
> 
> ### ** Examples
> 
> ##
> ##	example 1 : solving and plotting the system sys provided in the package
> ##
> data(syslin.don)
> syslin<-prepare(syslin.don)
>   evrunge(t=c(1:30),param=c(1,1),y0=c(1000,0),sys=sys,graph=TRUE)
Error in v == c(0, 1) || v == c(0) : 
  'length = 2' in coercion to 'logical(1)'
Calls: evrunge
Execution halted