diff --git a/Greenshot/Configuration/LanguageKeys.cs b/Greenshot/Configuration/LanguageKeys.cs
index fc08c50bc..2cb7d3fb0 100644
--- a/Greenshot/Configuration/LanguageKeys.cs
+++ b/Greenshot/Configuration/LanguageKeys.cs
@@ -156,6 +156,7 @@ namespace Greenshot.Configuration {
 		error_openfile,
 		error_openlink,
 		error_save,
+		error_save_invalid_chars,
 		help_title,
 		jpegqualitydialog_choosejpegquality,
 		qualitydialog_dontaskagain,
diff --git a/Greenshot/Destinations/FileDestination.cs b/Greenshot/Destinations/FileDestination.cs
index e08ddfff6..45454a395 100644
--- a/Greenshot/Destinations/FileDestination.cs
+++ b/Greenshot/Destinations/FileDestination.cs
@@ -84,14 +84,7 @@ namespace Greenshot.Destinations {
                 fullPath = captureDetails.Filename;
 				outputSettings.Format = ImageOutput.FormatForFilename(fullPath);
             } else {
-                LOG.InfoFormat("Creating new filename");
-                string pattern = conf.OutputFileFilenamePattern;
-                if (string.IsNullOrEmpty(pattern)) {
-                    pattern = "greenshot ${capturetime}";
-                }
-                string filename = FilenameHelper.GetFilenameFromPattern(pattern, conf.OutputFileFormat, captureDetails);
-                string filepath = FilenameHelper.FillVariables(conf.OutputFilePath, false);
-                fullPath = Path.Combine(filepath, filename);
+                fullPath = CreateNewFilename(captureDetails);
                 // As we generate a file, the configuration tells us if we allow to overwrite
                 overwrite = conf.OutputFileAllowOverwrite;
             }
@@ -130,5 +123,35 @@ namespace Greenshot.Destinations {
 			ProcessExport(exportInformation, surface);
 			return exportInformation;
 		}
+
+		private static string CreateNewFilename(ICaptureDetails captureDetails) {
+			string fullPath;
+			LOG.InfoFormat("Creating new filename");
+			string pattern = conf.OutputFileFilenamePattern;
+			if (string.IsNullOrEmpty(pattern)) {
+				pattern = "greenshot ${capturetime}";
+			}
+			string filename = FilenameHelper.GetFilenameFromPattern(pattern, conf.OutputFileFormat, captureDetails);
+			string filepath = FilenameHelper.FillVariables(conf.OutputFilePath, false);
+			try {
+				fullPath = Path.Combine(filepath, filename);
+			} catch (ArgumentException ae) {
+				// configured filename or path not valid, show error message...
+				LOG.InfoFormat("Generated path or filename not valid: {0}, {1}", filepath, filename);
+
+				MessageBox.Show(Language.GetString(LangKey.error_save_invalid_chars), Language.GetString(LangKey.error));
+				// ... lets get the pattern fixed....
+				var dialogResult = new SettingsForm().ShowDialog();
+				if (dialogResult == DialogResult.OK) { 
+					// ... OK -> then try again:
+					fullPath = CreateNewFilename(captureDetails);
+				} else { 
+					// ... cancelled.
+					fullPath = null;
+				}
+				
+			}
+			return fullPath;
+		}
 	}
 }
diff --git a/Greenshot/Languages/language-de-DE.xml b/Greenshot/Languages/language-de-DE.xml
index c38b5c59b..d990b164a 100644
--- a/Greenshot/Languages/language-de-DE.xml
+++ b/Greenshot/Languages/language-de-DE.xml
@@ -164,6 +164,7 @@ Bitte überprüfen Sie die Schreibrechte oder wählen Sie einen anderen Speicher
 		<resource name="error_openfile">Die Datei "{0}" konnte nicht geöffnet werden.</resource>
 		<resource name="error_openlink">Konnte Link '{0}' nicht öffnen.</resource>
 		<resource name="error_save">Screenshot konnte nicht gespeichert werden, bitte wählen Sie einen anderen Speicherort.</resource>
+    <resource name="error_save_invalid_chars">Der generierte Datei- oder Verzeichnisname ist nicht gültig. Bitte korrigieren Sie das Dateiname-Muster und versuchen Sie es erneut.</resource>
 		<resource name="expertsettings">Experten</resource>
 		<resource name="expertsettings_autoreducecolors">8-Bit-Bilder erstellen bei weniger als 256 Farben</resource>
 		<resource name="expertsettings_checkunstableupdates">Auch instabile Updates anbieten</resource>
diff --git a/Greenshot/Languages/language-en-US.xml b/Greenshot/Languages/language-en-US.xml
index a938e9680..a06d779bd 100644
--- a/Greenshot/Languages/language-en-US.xml
+++ b/Greenshot/Languages/language-en-US.xml
@@ -164,6 +164,7 @@ Please check write accessibility of the selected storage location.</resource>
 		<resource name="error_openfile">The file "{0}" could not be opened.</resource>
 		<resource name="error_openlink">Could not open link '{0}'.</resource>
 		<resource name="error_save">Could not save screenshot, please find a suitable location.</resource>
+    <resource name="error_save_invalid_chars">The generated filename or directory name is not valid. Please fix the filename pattern and then try again.</resource>
 		<resource name="expertsettings">Expert</resource>
 		<resource name="expertsettings_autoreducecolors">Create an 8-bit image if the colors are less than 256 while having a &gt; 8 bits image</resource>
 		<resource name="expertsettings_checkunstableupdates">Check for unstable updates</resource>