diff --git a/.github/workflows/check-path-length.yml b/.github/workflows/check-path-length.yml
new file mode 100644
index 00000000..fcf27498
--- /dev/null
+++ b/.github/workflows/check-path-length.yml
@@ -0,0 +1,39 @@
+# .github/workflows/check-path-length.yml
+name: Check Path Length (200 limit)
+
+on: 
+  push:
+  pull_request:
+
+jobs:
+  check-path-length:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Check file path lengths
+        run: |
+          # Set the maximum allowed length
+          MAX_LENGTH=200
+          # Find all files in the repository and check their path lengths
+          too_long_paths=0
+
+          # Loop through each file path found by find
+          IFS=$'\n'  # Set Internal Field Separator to newline to handle spaces in filenames
+          for file in $(find . -type f); do
+              length=${#file}
+              if (( length > MAX_LENGTH )); then
+                  echo "Path too long: $file ($length characters)"
+                  too_long_paths=$((too_long_paths + 1))
+              fi
+          done
+
+          if (( too_long_paths > 0 )); then
+            echo "Error: Found $too_long_paths file paths longer than $MAX_LENGTH characters."
+            exit 1
+          else
+            echo "All file paths are within the $MAX_LENGTH character limit."
+          fi
+      
\ No newline at end of file
diff --git a/klayout_dot_config/python/SiEPIC/scripts.py b/klayout_dot_config/python/SiEPIC/scripts.py
index 1535cf9c..7942fee3 100644
--- a/klayout_dot_config/python/SiEPIC/scripts.py
+++ b/klayout_dot_config/python/SiEPIC/scripts.py
@@ -3093,9 +3093,9 @@ def replace_cell(layout, cell_x_name, cell_y_name, cell_y_file=None, cell_y_libr
     
     import os
     if debug:
-        print(" - cell replacement for: %s, with cell %s (%s), "  % (cell_x_name, cell_y_name, os.path.basename(cell_y_file)))
+        print(" - cell replacement for: %s, with cell %s (%s or %s), "  % (cell_x_name, cell_y_name, cell_y_file, cell_y_library))
     log = ''
-    log += "- cell replacement for: %s, with cell %s (%s)\n"  % (cell_x_name, cell_y_name, os.path.basename(cell_y_file))
+    log += "- cell replacement for: %s, with cell %s (%s or %s)\n"  % (cell_x_name, cell_y_name, cell_y_file, cell_y_library)
 
     # Find the cells that need replacement (cell_x)
     # find cell name exactly matching cell_x_name
@@ -3555,7 +3555,10 @@ def __init__(self):
                             count_fixed_cells += 1
                 if not found:
                     print(' - Warning: no fixed GDS/OAS files found for library: %s, in folder: %s' % (library_name, dir_path))
-
+                else:
+                    if verbose:
+                        for c in self.layout().top_cells():
+                            print("   - cell: %s" % c.name )
 
             # Create the PCell declarations
             if folder_pcell:
diff --git a/klayout_dot_config/python/SiEPIC/utils/layout.py b/klayout_dot_config/python/SiEPIC/utils/layout.py
index 61352a73..3bae0bd3 100644
--- a/klayout_dot_config/python/SiEPIC/utils/layout.py
+++ b/klayout_dot_config/python/SiEPIC/utils/layout.py
@@ -18,6 +18,8 @@
 floorplan(topcell, x, y)
 new_layout(tech, topcell_name, overwrite = False)
 strip2rib
+FaML_two
+coupler_array
 
 TODO: enhance documentation
 TODO: make some of the functions in util use these.
@@ -1367,4 +1369,53 @@ def FaML_two(cell,
     cell.shapes(ly.layer(ly.TECHNOLOGY['Text'])).insert(text).text_size = 5/ly.dbu
     return [inst_faml1, inst_faml2]
 
-
+def coupler_array(cell, 
+             x_offset=0, 
+             y_offset=127e3/2-5e3,
+             pitch = 127e3,
+             count = 4,
+             label='opt_in_TE_1550_device_test', 
+             label_location = 2, 
+             label_size = 5,
+             cell_name = 'GC_TE_1550_8degOxide_BB',
+             cell_library = 'EBeam',
+             cell_params =  {},
+             ):
+    '''
+    Create a layout consisting of an array of optical couplers
+    return the instances
+    include automated test labels
+    
+    cell: into which to place the components
+    x_offset, y_offset: location to place them, bottom coupler
+    pitch: the pitch for the coupler array
+    
+    label: on Text layer
+    label_location: 1 is the top
+    label_size: font size
+    
+    cell_name, _library, _params: can be a fixed cell, or a PCell
+    
+    '''
+    from pya import Trans, CellInstArray, Text
+    ly = cell.layout()
+    
+    # Load cell from library, either fixed or PCell
+    cell_coupler = ly.create_cell(cell_name, cell_library, cell_params)
+    if not cell_coupler:
+        cell_coupler = ly.create_cell(cell_name, cell_library)
+    if not cell_coupler:
+        raise Exception ('Cannot load coupler cell (%s) from library (%s) with parameters (%s).' % (cell_name, cell_library, cell_params))
+
+    inst_couplers = []
+    for i in range(count):
+        t = Trans(Trans.R0, x_offset, y_offset + (count-i-1)*pitch)
+        inst_couplers.append( 
+            cell.insert(CellInstArray(cell_coupler.cell_index(), t))
+        )
+        if i==label_location-1:
+            # automated test label
+            text = Text (label, t)
+            cell.shapes(ly.layer(ly.TECHNOLOGY['Text'])).insert(text).text_size = label_size/ly.dbu
+        
+    return inst_couplers