[R-sig-dyn-mod] Getting Error while solving lsode()

[Daniel Reed]

Hi Munjal:

The error message actually suggests a solution: increase maxsteps. To do so, when you call the numerical integrator set the maxsteps parameter to a large number – I think the default is 5000, so some number beyond that. 

Cheers,
Daniel

_______________________________
Daniel C. Reed, PhD.
Postdoctoral Fellow,
Dept. of Earth & Environmental Sciences,
University of Michigan,
Ann Arbor, MI, USA.
email: reeddc at umich.edu
web: www.danielreed.org
Twitter: @DanielReedOcean

On Jul 14, 2014, at 10:38 AM, Munjal Patel <munjalpatel85 at gmail.com> wrote:

> Dear List,
> I am Solving ODE by use of lsode() and ode() functions(at different places)
> for example like N=100 or N=200 times
> 
> Unfortunately i am getting the following errors.
> Can you please suggest me the way of resolving this.
> 
> Your help will be appriaciated.
> Thank you very much
> 
> 
> 
> 
> 
> 
> 
> DLSODE-  At current T (=R1), MXSTEP (=I1) steps
>      taken on this call before reaching TOUT
>      In above message,  I1 =      5000
>      In above message,  R1 =  0.2610298726963D+04
> DLSODE-  At current T (=R1), MXSTEP (=I1) steps
>      taken on this call before reaching TOUT
>      In above message,  I1 =      5000
>      In above message,  R1 =  0.2770699522357D+04
>         Warning messages:1: In lsode(yini, c(0, time), defun, parms,
> rtol = 1e-08, atol = 1e-08,  :
>  an excessive amount of work (> maxsteps ) was done, but integration
> was not successful - increase maxsteps2: In lsode(yini, c(0, time),
> defun, parms, rtol = 1e-08, atol = 1e-08,  :
>  Returning early. Results are accurate, as far as they go3: In
> lsode(yini, c(0, time), defun, parms, rtol = 1e-08, atol = 1e-08,  :
>  an excessive amount of work (> maxsteps ) was done, but integration
> was not successful - increase maxsteps4: In lsode(yini, c(0, time),
> defun, parms, rtol = 1e-08, atol = 1e-08,  :
>  Returning early. Results are accurate, as far as they go
> 
> 
> 
> 
> 
> 
> 
> -- 
> Munjal Patel
> PhD Student
> Division of Pharmaceutical Sciences
> Long Island University
> Brooklyn,NY
> 
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> 
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