What data format is required for space usage analysis in the adehabitatHR package in R?

Question

I am working with location data (latitude and longitude coordinates obtained from GPS) to delimit living areas with kernel and MCP in the Adehabitathr package. I have already prepared the excel file containing individuals' names, information such as gender and reproductive condition, and X and Y coordinates.

What I have is something similar to the one below, but including at least 50 individuals and several locations of each:

Ind Sex  X        Y
A    1   19.10991 -48.23536
B     2  19.11009 -48.23545

I follow the commands of the package and ask to transform the file in sp format:

coordinates(track) <- c("X", "Y")

And I keep getting the same mistake:

Error in `[.data.frame`(object, , value) : undefined columns selected

I’ve tried to do it another way too:

tracksp<- SpatialPoints(track)

And then I get the mistake below:

Error in .checkNumericCoerce2double(obj) : 
  cannot retrieve coordinates from non-numeric elements

I am stuck. I believe it is the format that my coordinates are showing in excel, so that R can understand them. You can help me?

Thank you