NDSolve::mconly in algebraic differential equations
- To: mathgroup at smc.vnet.net
- Subject: [mg91145] NDSolve::mconly in algebraic differential equations
- From: "Adel Elsabbagh" <aelsabbagh at gmail.com>
- Date: Thu, 7 Aug 2008 04:41:10 -0400 (EDT)
Dear Mathematica Experts, I have a bunch of algebraic differential equations. Right now they are 12 first order differential equations in 12 time dependent variables, but in the future they can be a little bit more. The coefficients are complex numbers. When I try to integrate them numerically in time, I get the following error: NDSolve::mconly: For the method IDA, only machine real code is available. Unable to continue with complex values or beyond floating-point exceptions. In the NDSolve documentation though it says: The differential equations in NDSolve can involve complex numbers. I tried other methods but I get another error urging me to set the method to Automatic. Is Mathematica able to solve algebraic differential equations? How? Kind regards, -- Adel Elsabbagh http://www.svlab-asu.com/aelsabbagh.html