# NDSolve error: "The function T appears with no arguments."

Posted 5 months ago
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 I have this problem in the code, I tried to solve it, but I could not, thank you very much who takes the time to help. Solucion = NDSolve[{T'[V] == ( Ua (Subscript[T, a] - T[V]) + (-Subscript[r, a]) (-Subscript[\[CapitalDelta]H, R]))/( Subscript[F, ao] (Subscript[C, pA] + X[V] Subscript[\[CapitalDelta]C, p])), X'[V] == -\[InvisiblePrefixScriptBase]Subscript[r, A]/Subscript[F, Ao], X[0] == 0, T[0] == 1035}, {T, X}, {V, 0, 2}] 
 I removed the \[InvisiblePrefixScriptBase] and changed {V, 0, 2} to {T, 0, 2} (which I think is correct). The kernel crashes when the NSolve is evaluated. I am running 12.3.0 for Mac OS X x86 (64-bit) (May 10, 2021). Are you able to reproduce the crash? If so, you should report it to Wolfram Support. If you cannot, please respond here so I can report it. NDSolve[{T'[ V] == (Ua (Subscript[T, a] - T[V]) + (-Subscript[r, a]) (-Subscript[\[CapitalDelta]H, R]))/(Subscript[F, ao] (Subscript[C, pA] + X[V] Subscript[\[CapitalDelta]C, p])), X'[V] == -Subscript[r, A]/Subscript[F, Ao], X[0] == 0, T[0] == 1035}, {T[V], X[V]}, {T, 0, 2}]