diff --git a/src/main/java/nl/wur/bif/pantools/construction/grouping/Grouping.java b/src/main/java/nl/wur/bif/pantools/construction/grouping/Grouping.java
index e3ef96b4b614cd2084a3806320780f12ed349717..ff643f6eb2edc121829d130ae6a0d1d1d517b17f 100644
--- a/src/main/java/nl/wur/bif/pantools/construction/grouping/Grouping.java
+++ b/src/main/java/nl/wur/bif/pantools/construction/grouping/Grouping.java
@@ -733,7 +733,7 @@ public class Grouping {
             command = "mcl " + graph_path + " --abc -I " + MCL_INFLATION + " -o " + clusters_path + " -overlap keep -V all";
             Pantools.logger.debug(command);
             if (!executeCommand_for(command, 10 + (int) Math.round(group_size / 100000000.0 * group_size))) { // estimated time for MCL + 10 seconds for I/O
-                Pantools.logger.info("Failed to split group ID = {}", component.getFirst().getId());
+                Pantools.logger.warn("Failed to split group ID = {}", component.getFirst().getId());
                 homology_groups_list.put(component);
                 if ((tmp_file = new File(clusters_path)).exists()) {
                     tmp_file.delete();