Error in FUN(left, right) : non-numeric argument to binary operator

[vero_garcia2]

I'm working witha data base which all has numeric values - I have checked this in excel- and i'm trying to make a decision tree, but just as I try to execute the code:
arbolRpart <- rpart(Clasificador ~ Sexo , data - TC_train)

it always shows me the error:
Error in FUN(left, right) : non-numeric argument to binary operator

I really don't know what else to do,

I will glady acept any help regarding my problem.

Thank you in advance.

[technocrat]

I hate it when I do this!

data - TC_train

should have = instead of -

I've learned to look for operators when this happens like < when I meant <-