Strange NDSolve Error in Mathematica

1
votes

I am trying to numerically solve a long list of ordinary differential equations using NDSolve as follows:

sols = NDSolve[deqs, operons, {t, 0, 1000}];

where deqs holds the list of differential equations and operons stores the list of functions.

My error is "NDSolve::deqn: Equation or list of equations expected instead of False in the first argument "

and a sample of the string of error code it gives me afterward is:

acs'[t]==-0.04 acs[t]+(0.08Sin[0.01t]^4)/(1+Sin[<<1>>]^4), acs[0]==0, adaalkB'[t]==-0.04adaalkB[t]+0.08/(1+adaalkB[<<1>>]^2)

where acs[t] and adaalkb[t] are two of the functions in the differential equation.

I have no idea what the <<2>> or the <<1>> means, so if anyone could help, that would be appreciated.

1
wolfram-mathematica
This question is probably better for mathematica.stackexchange.com - eugen
<< ... >> is a Skeleton (search for it in the help system). It just means "there are omitted chars here" - Dr. belisarius
How to tell mathematica to show full error message without omitted text and without <<1>>? I have the similar issue and I want to see whole error message. - Zlelik

1 Answers

0
votes

Based on my own experience, I guess you have first(or somewhere else in the code) tried these equations with "=" instead of "==" which will set the variables. Try one of the following, hopefully it should work: -renaming all the variables in the NDSolve, to something which has not been used in your notebook before. OR -Killing the Kernels: CloseKernels[];