topic OdeSolve error in Mathcad https://www.ptcusercommunity.com/t5/Mathcad/OdeSolve-error/m-p/126432#M49783 <HTML><HEAD></HEAD><BODY><P>Hi, I have a system of differential equations to solve where I wish to vary an angle theta and plot responses in time waveform to show instabilities and a bifurcation diagram. I have used the same approach previously in a similar application that has solved successfully but for some reason theta is not recognized as a valid variable. Any help would be appreciated.</P><P>Thanks</P><P>Ross</P></BODY></HTML> Thu, 03 May 2018 14:59:06 GMT remslie 2018-05-03T14:59:06Z OdeSolve error https://www.ptcusercommunity.com/t5/Mathcad/OdeSolve-error/m-p/126432#M49783 Hi, I have a system of differential equations to solve where I wish to vary an angle theta and plot responses in time waveform to show instabilities and a bifurcation diagram. I have used the same approach previously in a similar application that has solved successfully but for some Thu, 03 May 2018 14:59:06 GMT https://www.ptcusercommunity.com/t5/Mathcad/OdeSolve-error/m-p/126432#M49783 remslie 2018-05-03T14:59:06Z