diff --git a/SetFormat.ps1 b/SetFormat.ps1
index 80d043b..3c24aa4 100644
--- a/SetFormat.ps1
+++ b/SetFormat.ps1
@@ -83,7 +83,7 @@
     begin {
         #Allow Set-Format to take Worksheet and range parameters (like Add Contitional formatting) -  convert them to an address
         if ($WorkSheet -and $Range) {$Address = $WorkSheet.Cells[$Range] }
-    }
+    } 
 
     process {
         if   ($Address -is [Array])  {
@@ -150,7 +150,7 @@
                 if ($Address -is [OfficeOpenXml.ExcelRow]   ) {$Address.Height = $Height }
                 elseif ($Address -is [OfficeOpenXml.ExcelRange] ) {
                     ($Address.Start.Row)..($Address.Start.Row + $Address.Rows) |
-                        ForEach-Object {$ws.Row($_).Height = $Height }
+                        ForEach-Object {$Address.WorkSheet.Row($_).Height = $Height }
                 }
                 else {Write-Warning -Message ("Can set the height of a row or a range but not a {0} object" -f ($Address.GetType().name)) }
             }
diff --git a/compare-WorkSheet.ps1 b/compare-WorkSheet.ps1
index c938f6f..13e741d 100644
--- a/compare-WorkSheet.ps1
+++ b/compare-WorkSheet.ps1
@@ -132,7 +132,7 @@
                 Sort-Object -Property "_Row","File"
     
     #if BackgroundColor was specified, set it on extra or extra or changed rows  
-    if     ($BackgroundColor ) {
+    if     ($diff -and $BackgroundColor) {
         #Differences may only exist in one file. So gather the changes for each file; open the file, update each impacted row in the shee, save the file  
         $updates = $diff.where({$_.SideIndicator -ne "=="}) | Group-object -Property "_File"
         foreach   ($file in $updates) {
@@ -160,7 +160,7 @@
         }
     }
     #if font colour was specified, set it on changed properties where the same key appears in both sheets. 
-    if     ($FontColor -and ($propList -contains $Key)  ) {
+    if     ($diff -and $FontColor -and ($propList -contains $Key)  ) {
         $updates = $diff.where({$_.SideIndicator -ne "=="})  | Group-object -Property $Key | where {$_.count -eq 2} 
         if ($updates) {
             $XL1 = Open-ExcelPackage -path $Referencefile
@@ -178,7 +178,7 @@
             if (-not $oneFile) {$xl2.Save() ; $xl2.Stream.Close() ; $xl2.Dispose()}
         }
     }
-    elseif ($FontColor) {Write-Warning -Message "To match rows to set changed cells, you must specify -Key and it must match one of the included properties" }   
+    elseif ($diff -and $FontColor) {Write-Warning -Message "To match rows to set changed cells, you must specify -Key and it must match one of the included properties" }   
 
     if     ($show)           { 
         Start-Process -FilePath $Referencefile