diff --git a/db/migrate/20150720180509_software_release_date.rb b/db/migrate/20150720180509_software_release_date.rb
index 7ee7a16..895d018 100644
--- a/db/migrate/20150720180509_software_release_date.rb
+++ b/db/migrate/20150720180509_software_release_date.rb
@@ -1,13 +1,15 @@
 class SoftwareReleaseDate < ActiveRecord::Migration
   def up
-    softwares = SoftwareInfo.all
-    softwares.each do |software|
-      if software.community
-        name = software.community.name.strip
-        software.community.name = name
-        software.community.save
-      else
-        software.destroy
+    if SoftwareInfo.table_exists?
+      softwares = SoftwareInfo.all
+      softwares.each do |software|
+        if software.community
+          name = software.community.name.strip
+          software.community.name = name
+          software.community.save
+        else
+          software.destroy
+        end
       end
     end
 
diff --git a/db/migrate/20150720190133_change_blocks_mirror_option.rb b/db/migrate/20150720190133_change_blocks_mirror_option.rb
index 7f13c08..12d490b 100644
--- a/db/migrate/20150720190133_change_blocks_mirror_option.rb
+++ b/db/migrate/20150720190133_change_blocks_mirror_option.rb
@@ -4,31 +4,37 @@ class ChangeBlocksMirrorOption < ActiveRecord::Migration
     institution = Community["institution"]
     software = Community["software"]
 
-    boxTemplateInstitution = institution.boxes.where(:position => 2).first
+    if institution
+      boxTemplateInstitution = institution.boxes.where(:position => 2).first
 
-    boxTemplateInstitution.blocks.each do |block|
-      block.mirror = true
-      print "." if block.save
+      boxTemplateInstitution.blocks.each do |block|
+        block.mirror = true
+        print "." if block.save
+      end
     end
 
-    boxTemplateSoftware = software.boxes.where(:position => 2).first
+    if software
+      boxTemplateSoftware = software.boxes.where(:position => 2).first
 
-    boxTemplateSoftware.blocks.each do |block|
-      block.mirror = true
-      print "." if block.save
+      boxTemplateSoftware.blocks.each do |block|
+        block.mirror = true
+        print "." if block.save
+      end
     end
 
-    blocks.each do |block|
-      if !(block.owner.class == Environment) && block.owner.organization? && !block.owner.enterprise?
-        if block.owner.software?
-          software_block = boxTemplateSoftware.blocks.where(:title => block.title).first
-          block.mirror_block_id = software_block.id if software_block
-        elsif block.owner.institution?
-          institution_block = boxTemplateInstitution.blocks.where(:title => block.title).first
-          block.mirror_block_id = institution_block.id if institution_block
+    if blocks
+      blocks.each do |block|
+        if !(block.owner.class == Environment) && block.owner.organization? && !block.owner.enterprise?
+          if block.owner.software?
+            software_block = boxTemplateSoftware.blocks.where(:title => block.title).first
+            block.mirror_block_id = software_block.id if software_block
+          elsif block.owner.institution?
+            institution_block = boxTemplateInstitution.blocks.where(:title => block.title).first
+            block.mirror_block_id = institution_block.id if institution_block
+          end
         end
+        print "." if block.save
       end
-      print "." if block.save
     end
     puts ""
   end
diff --git a/db/migrate/20150727161511_change_software_layout.rb b/db/migrate/20150727161511_change_software_layout.rb
deleted file mode 100644
index 86f2988..0000000
--- a/db/migrate/20150727161511_change_software_layout.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-class ChangeSoftwareLayout < ActiveRecord::Migration
-  def up
-    softwares = SoftwareInfo.all
-    softwares.each do |software|
-      software.community.layout_template = "lefttopright"
-      print "." if software.community.save
-      boxToMove = software.community.boxes.where(:position => 1).first
-      blockToMove = boxToMove.blocks.where(:type => "SoftwareInformationBlock").first
-      if blockToMove
-        newBox = software.community.boxes.where(:position => 4).first
-        blockToMove.box = newBox
-        print "." if blockToMove.save
-      end
-    end
-  end
-
-  def down
-  end
-end
--
libgit2 0.21.2