diff --git a/R/plotLoadings.R b/R/plotLoadings.R
index 1fb7aef2..4d6b45b6 100644
--- a/R/plotLoadings.R
+++ b/R/plotLoadings.R
@@ -532,7 +532,7 @@ plotLoadings.mint.pls <-
         if(any(study == "global"))
         {
             # if study == "global" then we plot the results on the concatenated data, thus direct call to plotLoadings.plsda
-            plotLoadings.mixo_pls(object = object, block = "X", comp = comp, ndisplay = ndisplay,
+            plotLoadings.mixo_pls(object = object, block = c("X", "Y"), comp = comp, ndisplay = ndisplay,
                                   size.name = size.name,
                                   name.var = name.var,
                                   name.var.complete = name.var.complete,
@@ -549,11 +549,11 @@ plotLoadings.mint.pls <-
             # if study != "global" then we plot the results on each study
             
             # -- input checks
-            check = check.input.plotLoadings(object = object, block = "X", title = title, col = col, size.name = size.name, name.var = name.var)
+            check = check.input.plotLoadings(object = object, block = c("X", "Y"), title = title, col = col, size.name = size.name, name.var = name.var)
             
             col = check$col
             size.name = check$size.name
-            block = check$block # "X"
+            block = check$block # c("X", "Y")
             
             #study needs to be either: from levels(object$study), numbers from 1:nlevels(study) or "global"
             if (any(!study%in%c(levels(object$study), "global" , "all.partial")))
@@ -970,7 +970,7 @@ check.input.plotLoadings <- function(object,
         if (!is(object, "DA"))
         {
             block = object$names$blocks
-        } else  if (is(object, c("mixo_plsda", "mixo_splsda"))) {
+        } else  if (inherits(object, c("mixo_plsda", "mixo_splsda"))) {
             block = "X"
         } else {
             if (!is.null(object$indY))
@@ -982,13 +982,13 @@ check.input.plotLoadings <- function(object,
         }
     }
     
-    if (is(object, c("mixo_plsda", "mixo_splsda")) & (!all(block %in% c(1,"X")) | length(block) > 1 ))
+    if (inherits(object, c("mixo_plsda", "mixo_splsda")) & (!all(block %in% c(1,"X")) | length(block) > 1 ))
         stop("'block' can only be 'X' or '1' for plsda and splsda object")
     
-    if (is(object, c("mixo_plsda", "mixo_splsda","pca")))
+    if (inherits(object, c("mixo_plsda", "mixo_splsda","pca")))
     {
         object$indY = 2
-    } else if (is(object, c("mixo_pls", "mixo_spls"))) {
+    } else if (inherits(object, c("mixo_pls", "mixo_spls"))) {
         object$indY = 3 # we don't want to remove anything in that case, and 3 is higher than the number of blocks which is 2
     }
     
@@ -1203,7 +1203,7 @@ get.loadings.ndisplay <- function(object,
     
     #comp
     # ----
-    if (is(object, c("mixo_pls","mixo_spls", "rcc")))# cause pls methods just have 1 ncomp, block approaches have different ncomp per block
+    if (inherits(object, c("mixo_pls","mixo_spls", "rcc")))# cause pls methods just have 1 ncomp, block approaches have different ncomp per block
     {
         ncomp = object$ncomp
         object$X = list(X = object$X, Y = object$Y) # so that the data is in object$X, either it's a pls or block approach