diff --git a/.gitignore b/.gitignore
index bf41cac..39a724a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@
 Thumbs.db
 ehthumbs.db
 
+*.gitignore
+
 # Folder config file
 Desktop.ini
 
@@ -14,6 +16,8 @@ $RECYCLE.BIN/
 *.msm
 *.msp
 
+*.dll
+
 # Windows shortcuts
 *.lnk
 
diff --git a/Set-Column.ps1 b/Set-Column.ps1
index d1f3590..36eb2eb 100644
--- a/Set-Column.ps1
+++ b/Set-Column.ps1
@@ -131,6 +131,7 @@
         $endRow                            = $Worksheet.Dimension.End.Row
     }
     process {
+        if ($null -eq $workSheet.Dimension) {Write-Warning "Can't format an empty worksheet."; return}
         if ($Column  -eq 0 )  {$Column     = $endColumn    + 1 }
         $columnName = [OfficeOpenXml.ExcelCellAddress]::new(1,$column).Address -replace "1",""
         Write-Verbose -Message "Updating Column $columnName"
diff --git a/Set-Row.ps1 b/Set-Row.ps1
index d286090..8896d25 100644
--- a/Set-Row.ps1
+++ b/Set-Row.ps1
@@ -126,6 +126,7 @@
         $endRow                              = $Worksheet.Dimension.End.Row
     }
     process {
+        if      ($null -eq $workSheet.Dimension) {Write-Warning "Can't format an empty worksheet."; return}
         if      ($Row  -eq 0 ) {$Row         = $endRow + 1 }
         Write-Verbose -Message "Updating Row $Row"
         #Add a row label
diff --git a/__tests__/AllFour.xlsx b/__tests__/AllFour.xlsx
new file mode 100644
index 0000000..f9ea4ee
Binary files /dev/null and b/__tests__/AllFour.xlsx differ
diff --git a/__tests__/PS5-And-4.0.5.0.xlsx b/__tests__/PS5-And-4.0.5.0.xlsx
new file mode 100644
index 0000000..cfc1fc8
Binary files /dev/null and b/__tests__/PS5-And-4.0.5.0.xlsx differ
diff --git a/__tests__/PS5-And-4.5.2.1.xlsx b/__tests__/PS5-And-4.5.2.1.xlsx
new file mode 100644
index 0000000..a5becd1
Binary files /dev/null and b/__tests__/PS5-And-4.5.2.1.xlsx differ
diff --git a/__tests__/PS6-And-4.0.5.0.xlsx b/__tests__/PS6-And-4.0.5.0.xlsx
new file mode 100644
index 0000000..9aa43a0
Binary files /dev/null and b/__tests__/PS6-And-4.0.5.0.xlsx differ
diff --git a/__tests__/PS6-And-4.5.2.1.xlsx b/__tests__/PS6-And-4.5.2.1.xlsx
new file mode 100644
index 0000000..0d4e73c
Binary files /dev/null and b/__tests__/PS6-And-4.5.2.1.xlsx differ
diff --git a/__tests__/Test Summary.xlsx b/__tests__/Test Summary.xlsx
new file mode 100644
index 0000000..dbed340
Binary files /dev/null and b/__tests__/Test Summary.xlsx differ