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From: zhang wei on 12 Jun 2010 23:19

when i use the dde23 to solve a delay differential equation ,there are many warning such as :
Warning: Failure at t=1.577281e+001. Unable to meet integration tolerances without
reducing the step size below the smallest value allowed (2.842171e-014) at time t.
> In dde23 at 486
In revisemodel_delay>fitnessat 236
In revisemodel_delay at 34

i have set the options=ddeset('RelTol',1e-4,'AbsTol',1e-7);
would you help me how to solve the problem? thank you very much!
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Prev: randomly placed shapes moving laterally, horizontally, or increasing in size
Next: how to handle the problem when use dde23