solving an ODE

[ptc-3985716]

I am trying to solve an ODE. I followed the example using ODEsolve. I get "too many initial conditions", but if I delete an initial conditon, I get "variable not defined".

I am either making a rookie mistake, or my equation can't be solved this way (it is somewhat ugly). Possibly both.

Any help would be greatly appreciated.

[AlanStevens · Accepted solution]

Is the attached any help?

Alan

Slightly modified file attached

[AlanStevens]

I should also add that, if you use the prime notation, you should put Pint`(t) not Pint(t)`

Alan