diff --git a/definitions/grib2/post_meta_data.hook.products_12.def b/definitions/grib2/post_meta_data.hook.products_12.def
index e22d01852..c344f6774 100644
--- a/definitions/grib2/post_meta_data.hook.products_12.def
+++ b/definitions/grib2/post_meta_data.hook.products_12.def
@@ -5,5 +5,5 @@
 concept gridSpecification(unknown, "gridSpecificationConcept.def", conceptsDir2, conceptsDir1): no_copy, read_only, dump;
 concept destineOrigin(unknown, "destineOriginConcept.def", conceptsDir2, conceptsDir1): no_copy, dump;
 
-# DestinE data does not have the domain key
+# ECC-1794: DestinE data does not have the domain key
 unalias mars.domain;
diff --git a/tests/grib_multi.sh b/tests/grib_multi.sh
index f8e2d94d8..028591264 100755
--- a/tests/grib_multi.sh
+++ b/tests/grib_multi.sh
@@ -11,7 +11,7 @@
 . ./include.ctest.sh
 
 label="grib_multi_test"
-tmpdata=temp.$label.$$.grib
+tmpdata=temp.$label.grib
 rm -f $tmpdata
 
 parameterNumber=`${tools_dir}/grib_get -p parameterNumber -w parameterCategory=2,parameterNumber=3 ${data_dir}/multi.grib2`
@@ -35,4 +35,16 @@ if [ -z "$parameterNumber"  ]; then
   exit 1
 fi
 
+# Convert to single-field
+# -----------------------
+infile=${data_dir}/multi.grib2
+${tools_dir}/grib_copy $infile $tmpdata
+c1=$(${tools_dir}/grib_count $infile)
+c2=$(${tools_dir}/grib_count $tmpdata)
+[ $c1 -eq 30 ]
+[ $c2 -eq 56 ]
+
+
+# Clean up
+rm -f $tmpdata
 rm -f $tmpdata.1 $tmpdata.rules