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## Re: DAE daspk solver problem

**From**: |
Sebastian Schöps |

**Subject**: |
Re: DAE daspk solver problem |

**Date**: |
Sat, 29 Oct 2016 09:22:16 -0700 (PDT) |

Lazy_Tom wrote
>* the output was :*
>* *
>* warning: Option "RelTol" not set, new value 1.0e-006 is used*
>* warning: called from*
>* radau5_test_1_V04 at line 19 column 6*
>* warning: Option "AbsTol" not set, new value 1.0e-006 is used*
>* warning: Option "NormControl" will be ignored by this solver*
>* warning: Option "InitialStep" not set, new value 1.0e-006 is used*
>* warning: Option "MaxStep" not set, new value 1.4e+000 is used*
>* warning: Option "Mass" only supports constant mass matrices M() and not*
>* M(t,y)*
Did you see the last line? The solver does not like function handles for the
mass matrix. However, you can just use the matrix itself:
vmass = diag([1, 1, 1, 1, 0]);
vopt = odeset ('Mass', vmass, 'NormControl', 'on');
I will try to look to your example in more detail next week.
Sebastian
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**DAE daspk solver problem**, *Lazy_Tom*, `2016/10/26`
**Re: DAE daspk solver problem**, *Sebastian Schöps*, `2016/10/27`
**Re: DAE daspk solver problem**, *Lazy_Tom*, `2016/10/27`
**Re: DAE daspk solver problem**, *Sebastian Schöps*, `2016/10/28`
**Re: DAE daspk solver problem**, *Bill Greene*, `2016/10/28`
**Re: DAE daspk solver problem**, *Lazy_Tom*, `2016/10/29`
**Re: DAE daspk solver problem**, *Sebastian Schöps*, `2016/10/29`
**Re: DAE daspk solver problem**, *Lazy_Tom*, `2016/10/29`
**Re: DAE daspk solver problem**,
*Sebastian Schöps* **<=**
**Re: DAE daspk solver problem**, *Lazy_Tom*, `2016/10/29`
**Re: DAE daspk solver problem**, *SunilShah*, `2016/10/28`
**Re: DAE daspk solver problem**, *Bill Greene*, `2016/10/28`
**Re: DAE daspk solver problem**, *SunilShah*, `2016/10/28`
**Re: DAE daspk solver problem**, *c.*, `2016/10/29`
**Re: DAE daspk solver problem**, *Lazy_Tom*, `2016/10/29`