I get the same warning...
res <- do.call(tune_grid,list(
object = modelObj # needed a name!
,preprocessor = preProc
,resamples = folds
,param_info = NULL
#,param_info = dials::parameters(modelObj)
,grid = tuningGrid
,metrics = NULL
,control = control_grid(save_pred = TRUE)
))
Warning message:
The ... are not used in this function but one or more objects were passed: 'preprocessor'