diff --git a/R/pgx-singlecell.R b/R/pgx-singlecell.R
index 4480c676..c60300e1 100644
--- a/R/pgx-singlecell.R
+++ b/R/pgx-singlecell.R
@@ -465,11 +465,11 @@ pgx.supercell <- function(counts, meta, group = NULL, gamma = 20) {
   ## require(SuperCell)
 
   X <- log2(1 + edgeR::cpm(counts) / 100)
-  if (is.null(group) && "group" %in% colnames(meta)) {
+  if (!is.null(group) && "group" %in% colnames(meta)) {
     cat("using group detected in meta\n")
     group <- meta[, "group"]
   }
-
+  
   SC <- SuperCell::SCimplify(X,
     gamma = gamma,
     n.var.genes = 1000,
@@ -477,26 +477,26 @@ pgx.supercell <- function(counts, meta, group = NULL, gamma = 20) {
     cell.split.condition = group
   )
 
+  meta <- as.data.frame(meta)
   dsel <- which(sapply(meta, class) %in% c("factor", "character", "logical"))
   group.argmax <- function(x) tapply(x, SC$membership, function(x) names(which.max(table(x))))
   dmeta <- apply(meta[, dsel, drop = FALSE], 2, function(x) as.character(group.argmax(x)))
   rownames(dmeta) <- sort(unique(SC$membership))
-
   csel <- which(sapply(meta, class) %in% c("numeric", "integer"))
   group.mean <- function(x) tapply(x, SC$membership, function(x) mean(x, na.rm = TRUE))
   cmeta <- apply(meta[, csel, drop = FALSE], 2, function(x) group.mean(x))
-
+  
   sc.meta <- data.frame(dmeta)
   if (length(csel) > 0) sc.meta <- cbind(sc.meta, cmeta)
   ii <- setdiff(match(colnames(meta), colnames(sc.meta)), NA)
   sc.meta <- sc.meta[, ii]
-
+  
   ## Compute metacall expression as sum of counts
   sc.counts <- SuperCell::supercell_GE(counts, mode = "sum", groups = SC$membership)
   sc.membership <- paste0("mc", SC$membership)
   colnames(sc.counts) <- paste0("mc", 1:ncol(sc.counts))
   rownames(sc.meta) <- colnames(sc.counts)
-
+  
   list(counts = sc.counts, meta = sc.meta, membership = sc.membership)
 }
 
@@ -504,7 +504,7 @@ pgx.supercell <- function(counts, meta, group = NULL, gamma = 20) {
 pgx.supercellX <- function(X, meta, group = NULL, gamma = 20) {
   ## require(SuperCell)
 
-  if (is.null(group) && "group" %in% colnames(meta)) {
+  if (!is.null(group) && "group" %in% colnames(meta)) {
     cat("using group detected in meta\n")
     group <- meta[, "group"]
   }
@@ -625,12 +625,17 @@ pgx.createSeuratObject <- function(counts, samples, sct = TRUE) {
   obj
 }
 
+
+#' @export
 pgx.runAzimuth <- function(counts, reference = "pbmcref") {
+  require(Seurat)
+  options(future.globals.maxSize= 4*1024^3)  ## needed  
   obj <- pgx.createSeuratObject(counts, samples = NULL, sct = FALSE)
   obj1 <- Azimuth::RunAzimuth(obj, reference = reference, verbose = FALSE)
   k1 <- !(colnames(obj1@meta.data) %in% colnames(obj@meta.data))
   k2 <- !grepl("score$|refAssay$", colnames(obj1@meta.data))
-  obj1@meta.data[, (k1 & k2)]
+  meta1 <- obj1@meta.data[, (k1 & k2)]
+  return(meta1)
 }