1 files changed, 2 insertions, 0 deletions
diff --git a/bin/chroma-sim b/bin/chroma-sim
index b6587f9..0d737c4 100755
--- a/bin/chroma-sim
+++ b/bin/chroma-sim
@@ -13,6 +13,8 @@ if __name__ == '__main__':
     from chroma import itertoolset
     from chroma import Simulation
     from chroma import root
+    from chroma.rootimport import ROOT
+    ROOT.gROOT.SetBatch()
 
     parser = optparse.OptionParser('%prog <detector>')
     parser.add_option('-o', dest='output_filename',