From 92e7991db9589045aa4b07cf6c7543f3903e1b59 Mon Sep 17 00:00:00 2001
From: Aaron LI <aaronly.me@outlook.com>
Date: Fri, 17 Feb 2017 15:04:17 +0800
Subject: event2image.py: Use relative paths; Validate energy range

---
 scripts/event2image.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/event2image.py b/scripts/event2image.py
index cba1d89..ba5e216 100755
--- a/scripts/event2image.py
+++ b/scripts/event2image.py
@@ -72,10 +72,15 @@ def main():
     setup_pfiles(["dmkeypar", "dmcopy"])
 
     manifest = get_manifest()
-    fov = manifest.getpath("fov")
-    infile = args.infile if args.infile else manifest.getpath("evt2_clean")
+    fov = manifest.getpath("fov", relative=True)
+    if args.infile:
+        infile = args.infile
+    else:
+        infile = manifest.getpath("evt2_clean", relative=True)
     chips = ACIS.get_chips_str(infile, sep="-")
     erange = "{elow}-{ehigh}".format(elow=args.elow, ehigh=args.ehigh)
+    if args.elow >= args.ehigh:
+        raise ValueError("invalid energy range: %s" % erange)
     if args.outfile:
         outfile = args.outfile
     else:
-- 
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