Hi, I hope you are all doing well so I am trying to solve this differential equations which depends on radial and a time parameter to find the velocity, as an initial condition i took the value of the stationnary condition wich I solved separately. So when i tried to solve the final eqations i got these errors which I dont know what causes it, is it the initial conditions or the method in which i want to solve it. So if any one of you have an idea it would help me a lot Thank you all in advance
