Illegal argument: training_frame of function: grid: Cannot append new models to a grid with different training input

[Evan123]

Error: Illegal argument: training_frame of function: grid: Cannot append new models to a grid with different training input

I want to train a regression model by random forest. I have defined a search grid by H2O. But I got this error: Error: Illegal argument: training_frame of function: grid: Cannot append new models to a grid with different training input. I need to mention I get this error in "build grid search " section This is my code: set.seed(200) dataset1 = a #dataframe # Splitting data into Train and Test dataset = dataset1[, 2:length(dataset1)] ind <- sample(2, nrow(dataset), replace=TRUE, prob=c(0.70, 0.30)) train_data <- dataset[ind==1, 1:ncol(dataset)] test_data <- dataset[ind==2, 1:ncol(dataset)] h2o.no_progress() h2o.init(max_mem_size = "5g") # create feature names y <- "Exp…