diff --git a/sw/ext/blackmagic/Makefile b/sw/ext/blackmagic/Makefile
index ba15bd3b15..f886c40a48 100644
--- a/sw/ext/blackmagic/Makefile
+++ b/sw/ext/blackmagic/Makefile
@@ -1,6 +1,6 @@
 # Hey Emacs, this is a -*- makefile -*-
 
-BLACKSPHERE = http://blacksphere.co.nz/builds
+BLACKSPHERE = http://blacksphere.co.nz/builds/archive/2014
 BLACKMAGIC = blackmagic-20141017.bin
 
 Q=@
diff --git a/sw/ext/blackmagic/stm32_mem.py b/sw/ext/blackmagic/stm32_mem.py
index 9bf20d9c99..11c9e2f6c0 100755
--- a/sw/ext/blackmagic/stm32_mem.py
+++ b/sw/ext/blackmagic/stm32_mem.py
@@ -93,6 +93,8 @@ if __name__ == "__main__":
 	dfudev.make_idle()
 
 	bin = open(argv[1], "rb").read()
+	if len(bin) == 0:
+		print ("ERROR: File length is zero! (Try downloading again)\r")
 
 	addr = 0x8002000
 	while bin: