Good day Sirs;

     Please, anyone with informations on the error "Error, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system". I can't understand what it means.

     Attached below is the code.

    Thank you in advance.

New.mw

Hello everyone,

  How do I go around this PDE. I think I have input all the necessary required but its given the error code "Error, invalid input: subs received [beta = .5, v = .5, v__l = 1.0, eta = 1.5, false], which is not valid for its 1st argument". 

Below is attached the code.

pde.mw

Please, anyone with any information should help. Thanking you in anticipation.

Good day sirs,

         I am trying to solve this system of equations attached below, but got the following error message "The use of global variables in numerical ODE problems is deprecated, and will be removed in a future release".

       Anyone with useful informations please.

       Below is attached

Good morning sirs,

I have been trying to compute this problem to its given me the error message "Error, invalid input: rhs received {f[0](eta) = -(1/50)*eta^2+(1/5)*eta+1/5, theta[0](eta) = -eta+5}, which is not valid for its 1st argument, expr".

The problem is attach below.

Please, anyone with useful informations should help.

Thanks

HPM_4.mw

Hello everyone,

Compliment of the season. I received the error message while trying to solve some Pade approximant problem and try to find what could possibly be the error but could not.

Please, anyone with good informations on the possible solutions should help.

Thanks. The Link is below

 Error.mw