added missing string-concat plus sign
@@ -83,7 +83,7 @@ def get_outdir(params, suffix='_treetime'):
outdir = outdir_stem + suffix.rstrip('/')+'/'
count = 1
while os.path.exists(outdir):
- outdir = outdir_stem '-%04d'%count + suffix.rstrip('/')+'/'
+ outdir = outdir_stem + '-%04d'%count + suffix.rstrip('/')+'/'
count += 1
os.makedirs(outdir)
