Index: src/uk/me/parabola/mkgmap/combiners/GmapiBuilder.java
===================================================================
--- src/uk/me/parabola/mkgmap/combiners/GmapiBuilder.java	(revision 4636)
+++ src/uk/me/parabola/mkgmap/combiners/GmapiBuilder.java	(working copy)
@@ -99,7 +99,7 @@
 				typFile = info.getFilename();
 
 		} catch (IOException e) {
-			e.printStackTrace();
+			throw new ExitException("Error saving gmapi data", e);
 		}
 	}
 
@@ -131,7 +131,7 @@
 			writeXmlFile(gmapDir);
 
 		} catch (IOException e) {
-			e.printStackTrace();
+			throw new ExitException("Error building gmapi data", e);
 		}
 	}