diff --git a/index.js b/index.js
index 7b40d5f..47d1895 100644
--- a/index.js
+++ b/index.js
@@ -69,7 +69,7 @@ function diff(current, checked) {
       console.log(`split: ${split}`);
       let index = filenames_checked.indexOf(split[0]);
       console.log(`index: ${index}`);
-      if (index == -1) {
+      if (index == -1 || filenames_checked[index] == undefined) {
         result += `${split[0]} download\n`;
         continue;
       }
diff --git a/projects/updater/install.lua b/projects/updater/install.lua
index 57bed7d..36bcc55 100644
--- a/projects/updater/install.lua
+++ b/projects/updater/install.lua
@@ -60,6 +60,7 @@ local function getAllFiles()
     local result = http.get(indexesUrl)
     if result == nil then
       print("error! getting indexes for " .. programToInstall)
+      error()
     end
     local resultText = result.readAll()
     local resultTable = split(resultText, "\n")
diff --git a/projects/updater/update.lua b/projects/updater/update.lua
index b0f1bef..226d8cb 100644
--- a/projects/updater/update.lua
+++ b/projects/updater/update.lua
@@ -64,6 +64,7 @@ local function getAllFiles()
     local result = http.post(updateUrl, currentFiles)
     if result == nil then
       print("error! getting updates for " .. programToInstall)
+      error()
     end
     local resultText = result.readAll()
     local resultTable = split(resultText, "\n")
@@ -71,6 +72,7 @@ local function getAllFiles()
     local result2 = http.get(indexesUrl)
     if result2 == nil then
       print("error! getting indexes for " .. programToInstall)
+      error()
     end
     local resultText2 = result2.readAll()
     local resultTable2 = split(resultText2, "\n")