diff --git a/NAMESPACE b/NAMESPACE
index 53a3e0fd..42ef9c61 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -12,6 +12,7 @@ export(check_experiment)
 export(check_experiments)
 export(check_experiments_all_inference_models_are_unique)
 export(check_experiments_candidates_have_same_mcmcs)
+export(check_gen_and_cand_exps_save_to_different_files)
 export(check_inference_conditions)
 export(check_init_pir_params)
 export(check_is_ns_beast2_pkg_installed)
diff --git a/R/check_experiments.R b/R/check_experiments.R
index c3d39259..d75ac2d0 100644
--- a/R/check_experiments.R
+++ b/R/check_experiments.R
@@ -53,7 +53,6 @@ check_experiments <- function(
   if (length(experiments) == 1) return()
 
   testit::assert(length(experiments) >= 2)
-
   pirouette::check_candidates_save_to_same_files(experiments)
   pirouette::check_experiments_candidates_have_same_mcmcs(experiments)
 
@@ -73,4 +72,5 @@ check_experiments <- function(
     stop("If multiple experiments, generative is either first or absent")
   }
   pirouette::check_experiments_all_inference_models_are_unique(experiments)
+  pirouette::check_gen_and_cand_exps_save_to_different_files(experiments)
 }
diff --git a/R/check_gen_and_cand_save_to_different_files.R b/R/check_gen_and_cand_save_to_different_files.R
new file mode 100644
index 00000000..549fd5c4
--- /dev/null
+++ b/R/check_gen_and_cand_save_to_different_files.R
@@ -0,0 +1,18 @@
+#' @export
+check_gen_and_cand_exps_save_to_different_files <- function(experiments) { # nolint indeed a long function name
+  if (length(experiments) < 2) return()
+  if (experiments[[1]]$inference_conditions$model_type != "generative") {
+    return()
+  }
+  testthat::expect_equal(
+    experiments[[2]]$inference_conditions$model_type,
+    "candidate"
+  )
+  if (experiments[[1]]$errors_filename == experiments[[2]]$errors_filename) {
+    stop(
+      "The errors filenames of generative and candidate experiments ",
+      "must differ. ",
+      "Actual value: ", experiments[[1]]$errors_filename
+    )
+  }
+}
diff --git a/tests/testthat/test-check_experiments.R b/tests/testthat/test-check_experiments.R
index 0d2a678c..c5e5f78c 100644
--- a/tests/testthat/test-check_experiments.R
+++ b/tests/testthat/test-check_experiments.R
@@ -67,7 +67,7 @@ test_that("correct order of experiments", {
   )
 })
 
-test_that("same beast2_options_filenames and error fileanames in candidates", {
+test_that("same beast2_options_filenames and error filenames in candidates", {
 
   if (rappdirs::app_dir()$os == "win") return()
 
@@ -216,3 +216,18 @@ test_that("detect same model in two candidate models", {
     "All inference models must be unique"
   )
 })
+
+test_that("different error filenames between generative and candidate", {
+
+  if (rappdirs::app_dir()$os == "win") return()
+
+  experiments <- create_test_pir_params_setup(
+    has_candidate = TRUE
+  )$experiments
+  experiments[[1]]$errors_filename <- "errors.csv"
+  experiments[[2]]$errors_filename <- "errors.csv"
+  expect_error(
+    check_experiments(experiments),
+    "The errors filenames of generative and candidate experiments must differ"
+  )
+})