diff --git a/create-arista-veos-image/create-arista-veos-image.sh b/create-arista-veos-image/create-arista-veos-image.sh
index ae692ab..cf798c0 100644
--- a/create-arista-veos-image/create-arista-veos-image.sh
+++ b/create-arista-veos-image/create-arista-veos-image.sh
@@ -13,6 +13,7 @@
 # V1.3.2  changed the extension of the bootloader iso to match the size of the partitions to be injected
 # V1.4    support for variable VEOS image sizes (as requested by @Jade_Deane to use custom VEOS images)
 # V1.4.1  fixed check for existing images
+# V1.5    fixed detection of missing loop files for Ubuntu 16.04 in VIRL >=1.3, added default subtype creation
 
 # usage
 if [ ! $# -eq 3 ] ; then
@@ -77,6 +78,7 @@ echo "Creating vEOS image..."
 echo "==========================================================="
 
 # create a copy of Aboot bootloader and extend it to 3G
+echo "Creating a copy of Aboot bootloader in $TMP_NAME.raw..."
 cp $1 $TMP_NAME.raw
 
 echo
@@ -84,13 +86,43 @@ echo "Extracting partitions from vEOS vmdk..."
 echo "==========================================================="
 
 # convert vmdk to raw and extract two partitions in it
+echo "Converting vmdk image to raw..."
 qemu-img convert -O raw $2 $VEOS_VMDK_BASENAME.raw
 LOOPDEV=$(kpartx -av $VEOS_VMDK_BASENAME.raw)
 LOOPDEV_PART1=$(echo "$LOOPDEV" | sed '1q;d' | cut -d " " -f 3)
 LOOPDEV_PART2=$(echo "$LOOPDEV" | sed '2q;d' | cut -d " " -f 3)
+echo "Output from kpartx: $LOOPDEV"
+echo "PART1: $LOOPDEV_PART1"
+echo "PART2: $LOOPDEV_PART2"
+echo -n "waiting for loop devs from kpartx"
+LOOP_DEV_RETRIES=0
+until dd if=/dev/mapper/$LOOPDEV_PART1 of=/dev/null bs=1k count=1 &>/dev/null && dd if=/dev/mapper/$LOOPDEV_PART2 of=/dev/null bs=1k count=1 &>/dev/null ; do
+  echo -n "."
+  LOOP_DEV_RETRIES=$(expr $LOOP_DEV_RETRIES + 1)
+  if [ $LOOP_DEV_RETRIES -eq 10 ]; then
+    echo
+    echo "ERROR: timeout waiting for loop devs from kaprtx"
+    exit
+  fi
+  sleep 1
+done
+echo
+echo "using dd to extract partitions..."
 dd if=/dev/mapper/$LOOPDEV_PART1 of=$VEOS_VMDK_BASENAME-p1.raw
 dd if=/dev/mapper/$LOOPDEV_PART2 of=$VEOS_VMDK_BASENAME-p2.raw
-kpartx -d $VEOS_VMDK_BASENAME.raw
+LOOP_DEV_DEL_RETRIES=0
+echo "removing loop devs from kpartx"
+until kpartx -vd $VEOS_VMDK_BASENAME.raw ; do
+  echo -n "."
+  LOOP_DEV_DEL_RETRIES=$(expr $LOOP_DEV_DEL_RETRIES + 1)
+  if [ $LOOP_DEV_DEL_RETRIES -eq 10 ]; then
+    echo
+    echo "ERROR: timeout waiting for loop dev removal from kaprtx"
+    exit
+  fi
+  sleep 1
+done
+echo
 
 echo
 echo "Injecting rc.eos startup script to get switch config..."
@@ -98,8 +130,10 @@ echo "==========================================================="
 
 # inject rc.eos script in first partition of the image, to get switch config defined in VM Maestro (config-drive)
 mkdir swi-$TIMESTAMP
+echo "loop mounting image..."
 mount -o loop $VEOS_VMDK_BASENAME-p1.raw swi-$TIMESTAMP
 cd swi-$TIMESTAMP
+echo "injecting rc.eos..."
 cat << EOF > rc.eos
 #!/bin/sh
 #
@@ -134,6 +168,7 @@ EOF
 chmod 755 rc.eos
 cd ..
 
+echo "unmounting image..."
 safe_unmount swi-$TIMESTAMP
 
 rm -rf swi-$TIMESTAMP
@@ -142,19 +177,31 @@ echo
 echo "Injecting new partitions from vEOS vmdk in Aboot image..."
 echo "==========================================================="
 
+echo "$VEOS_VMDK_BASENAME.raw (original vEOS vmdk layout):"
+fdisk -l $VEOS_VMDK_BASENAME.raw
+
+echo "$TMP_NAME.raw (original ABoot bootloader layout):"
+fdisk -l $TMP_NAME.raw
+
 # calulate size of the two partitions
 PART1_START=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw1" | tr -s " " | cut -d ' ' -f 3)
 PART1_END=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw1" | tr -s " " | cut -d ' ' -f 4)
 PART1_LENGTH=$(expr $PART1_END - $PART1_START)
 
+echo "raw1 start=$PART1_START,end=$PART1_END,length=$PART1_LENGTH"
+
 PART2_START=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw2" | tr -s " " | cut -d ' ' -f 2)
 PART2_END=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw2" | tr -s " " | cut -d ' ' -f 3)
 PART2_LENGTH=$(expr $PART2_END - $PART2_START)
 
+echo "raw2 start=$PART2_START,end=$PART2_END,length=$PART2_LENGTH"
+
 # extend the bootloader iso to be able to append the two partitions
 EXTENSION_SIZE=$(ls -lk $VEOS_VMDK_BASENAME.raw | tr -s " " | cut -d " " -f 5)
+echo "extending image $TMP_NAME.raw to +$EXTENSION_SIZE"
 truncate -s +$EXTENSION_SIZE $TMP_NAME.raw
 
+echo "appending partitions from vmdk in the bootloader iso in $TMP_NAME.raw..."
 # append the two partitions from vmdk in the bootloader iso
 echo -e "n
 p
@@ -174,15 +221,47 @@ p
 t
 3
 12
-w" | fdisk $TMP_NAME.raw >/dev/null
+w" | fdisk $TMP_NAME.raw
+
+echo "$TMP_NAME.raw (new combined image layout):"
+fdisk -l $TMP_NAME.raw
 
 # copy the partitions from vEOS vmdk to new image
 LOOPDEV=$(kpartx -av $TMP_NAME.raw)
 LOOPDEV_PART2=$(echo "$LOOPDEV" | sed '2q;d' | cut -d " " -f 3)
 LOOPDEV_PART3=$(echo "$LOOPDEV" | sed '3q;d' | cut -d " " -f 3)
+echo "Output from kpartx: $LOOPDEV"
+echo "PART1: $LOOPDEV_PART1"
+echo "PART2: $LOOPDEV_PART2"
+echo -n "waiting for loop devs from kpartx"
+LOOP_DEV_RETRIES=0
+until dd if=/dev/mapper/$LOOPDEV_PART2 of=/dev/null bs=1k count=1 &>/dev/null && dd if=/dev/mapper/$LOOPDEV_PART3 of=/dev/null bs=1k count=1 &>/dev/null ; do
+  echo -n "."
+  LOOP_DEV_RETRIES=$(expr $LOOP_DEV_RETRIES + 1)
+  if [ $LOOP_DEV_RETRIES -eq 10 ]; then
+    echo
+    echo "ERROR: timeout waiting for loop devs from kaprtx"
+    exit
+  fi
+  sleep 1
+done
+echo
+echo "copying the partitions from vEOS vmdk to new image..."
 dd if=$VEOS_VMDK_BASENAME-p1.raw of=/dev/mapper/$LOOPDEV_PART2
 dd if=$VEOS_VMDK_BASENAME-p2.raw of=/dev/mapper/$LOOPDEV_PART3
-kpartx -d $TMP_NAME.raw
+LOOP_DEV_DEL_RETRIES=0
+echo "removing loop devs from kpartx"
+until kpartx -vd $TMP_NAME.raw ; do
+  echo -n "."
+  LOOP_DEV_DEL_RETRIES=$(expr $LOOP_DEV_DEL_RETRIES + 1)
+  if [ $LOOP_DEV_DEL_RETRIES -eq 10 ]; then
+    echo
+    echo "ERROR: timeout waiting for loop dev removal from kaprtx"
+    exit
+  fi
+  sleep 1
+done
+echo
 
 echo
 echo "Convert new image to qcow2..."
@@ -209,21 +288,68 @@ glance image-create --container-format bare --disk-format qcow2 --visibility pub
   --property hw_vif_model=e1000 --property hw_cdrom_type=ide --property release="$GLANCE_IMAGE_RELEASE" --property subtype=IOSv --property config_disk_type=disk
 
 # create default flavor
-CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show vEOS.small 2>&1)
+CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show $GLANCE_IMAGE_NAME.small 2>&1)
 if [ $? == 1 ]; then
-  echo "Creating default flavor vEOS.small..."
+  echo "Creating default flavor $GLANCE_IMAGE_NAME.small..."
   echo "==========================================================="
 
-  nova flavor-create --is-public true vEOS.small auto 1024 0 1
+  nova flavor-create --is-public true $GLANCE_IMAGE_NAME.small auto 1024 0 1
+else
+  echo "Default flavor $GLANCE_IMAGE_NAME.small already exists..."
 fi
-CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show vEOS.medium 2>&1)
+CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show $GLANCE_IMAGE_NAME.medium 2>&1)
 if [ $? == 1 ]; then
-  echo "Creating default flavor vEOS.medium..."
+  echo "Creating default flavor $GLANCE_IMAGE_NAME.medium..."
   echo "==========================================================="
 
-  nova flavor-create --is-public true vEOS.medium auto 2048 0 1
+  nova flavor-create --is-public true $GLANCE_IMAGE_NAME.medium auto 2048 0 1
+else
+  echo "Default flavor $GLANCE_IMAGE_NAME.medium already exists..."
 fi
 
+# create deault subtype
+cat << EOF > dynamic-subtype-$GLANCE_IMAGE_NAME.json.default
+{
+  "dynamic-subtypes": [
+    {
+      "plugin_name": "$GLANCE_IMAGE_NAME",
+      "cli_serial": 1,
+      "plugin_desc": "Arista vEOS",
+      "baseline_image": "$GLANCE_IMAGE_NAME",
+      "hw_ram": 1024,
+      "hw_vm_extra": "",
+      "interface_wrap": 7,
+      "config_disk_type": "disk",
+      "interface_pattern": "Ethernet{0}",
+      "gui_visible": true,
+      "config_file": "/veos_config.txt",
+      "interface_first": 1,
+      "gui_icon": "iosvl2",
+      "plugin_base": "generic",
+      "vnc_available": false,
+      "interface_management": "Management1",
+      "interface_range": 7,
+      "baseline_flavor": "$GLANCE_IMAGE_NAME.medium"
+    }
+  ]
+}
+EOF
+CHECKING_FOR_EXISTING_SUBTYPE=$(virl_uwm_client subtype-info 2>&1 | grep $GLANCE_IMAGE_NAME)
+if [ $? == 1 ]; then
+  echo "Creating default subtype $GLANCE_IMAGE_NAME..."
+  echo "==========================================================="
+
+  virl_uwm_client subtype-import --dynamic-subtypes @dynamic-subtype-$GLANCE_IMAGE_NAME.json.default
+else
+  echo "Default subtype $GLANCE_IMAGE_NAME already exists..."
+fi
+rm dynamic-subtype-$GLANCE_IMAGE_NAME.json.default
+
+echo
+echo "Image creation successful."
+echo "==========================================================="
+echo
+echo "You can import and use the subtype $GLANCE_IMAGE_NAME in VM Maestro..."
 
 #testing:
 #