diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
index 1d86abf6..989a279c 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
@@ -126,6 +126,7 @@ const val ERROR_LOGIN_LIBRUS_PORTAL_CSRF_EXPIRED            = 184
 const val ERROR_LIBRUS_API_DEVICE_REGISTERED                = 185
 const val ERROR_LIBRUS_MESSAGES_NOT_FOUND                   = 186
 const val ERROR_LOGIN_LIBRUS_API_INVALID_REQUEST            = 187
+const val ERROR_LIBRUS_MESSAGES_ATTACHMENT_NOT_FOUND        = 188
 
 const val ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_LOGIN        = 201
 const val ERROR_LOGIN_MOBIDZIENNIK_WEB_OLD_PASSWORD         = 202
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/messages/LibrusSandboxDownloadAttachment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/messages/LibrusSandboxDownloadAttachment.kt
index ff3196ea..c6131bb2 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/messages/LibrusSandboxDownloadAttachment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/messages/LibrusSandboxDownloadAttachment.kt
@@ -34,15 +34,22 @@ class LibrusSandboxDownloadAttachment(override val data: DataLibrus,
     init {
         val keyMatcher = Regexes.LIBRUS_ATTACHMENT_KEY.find(downloadLink)
 
-        if (keyMatcher != null) {
-            getAttachmentCheckKeyTries = 0
-
-            val attachmentKey = keyMatcher[1]
-            getAttachmentCheckKey(attachmentKey) {
-                downloadAttachment("${LIBRUS_SANDBOX_URL}CSDownload&singleUseKey=$attachmentKey", method = POST)
+        when {
+            downloadLink.contains("CSDownloadFailed") -> {
+                data.error(ApiError(TAG, ERROR_LIBRUS_MESSAGES_ATTACHMENT_NOT_FOUND))
+                onSuccess()
+            }
+            keyMatcher != null -> {
+                getAttachmentCheckKeyTries = 0
+
+                val attachmentKey = keyMatcher[1]
+                getAttachmentCheckKey(attachmentKey) {
+                    downloadAttachment("${LIBRUS_SANDBOX_URL}CSDownload&singleUseKey=$attachmentKey", method = POST)
+                }
+            }
+            else -> {
+                downloadAttachment("$downloadLink/get", method = GET)
             }
-        } else {
-            downloadAttachment("$downloadLink/get", method = GET)
         }
     }
 
diff --git a/app/src/main/res/values/errors.xml b/app/src/main/res/values/errors.xml
index b0eb94dd..8d14b725 100644
--- a/app/src/main/res/values/errors.xml
+++ b/app/src/main/res/values/errors.xml
@@ -98,6 +98,7 @@
     <string name="error_185" translatable="false">ERROR_LIBRUS_API_DEVICE_REGISTERED</string>
     <string name="error_186" translatable="false">ERROR_LIBRUS_MESSAGES_NOT_FOUND</string>
     <string name="error_187" translatable="false">ERROR_LOGIN_LIBRUS_API_INVALID_REQUEST</string>
+    <string name="error_188" translatable="false">ERROR_LIBRUS_MESSAGES_ATTACHMENT_NOT_FOUND</string>
 
     <string name="error_201" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_LOGIN</string>
     <string name="error_202" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_OLD_PASSWORD</string>
@@ -273,6 +274,7 @@
     <string name="error_185_reason">Urządzenie jest już zarejestrowane</string>
     <string name="error_186_reason">Nie znaleziono wiadomości. Mogła zostać usunięta.</string>
     <string name="error_187_reason">Nieprawidłowe dane dostępu. Sprawdź poprawność wprowadzonych danych.</string>
+    <string name="error_188_reason">Nie znaleziono załącznika. Mógł zostać usunięty.</string>
 
     <string name="error_201_reason">Nieprawidłowy login lub hasło</string>
     <string name="error_202_reason">Podano stare hasło</string>