diff --git a/pipeline/prepareCatalogs.py b/pipeline/prepareCatalogs.py
index bbddc2d..d331d85 100755
--- a/pipeline/prepareCatalogs.py
+++ b/pipeline/prepareCatalogs.py
@@ -19,11 +19,12 @@ figDir = os.getenv("PWD")+"/../figs/multidark/"
 logDir = os.getenv("PWD")+"/../logs/multidark/"
 
 dataFormat = "multidark"
+dataUnit = 1
 dataType = "simulation"
 useLightCone = True
 
-redshifts = (("0.0", "0.53", "1.0"))
 redshiftFileBase = "mdr1_particles_z"
+redshifts = (("0.0", "0.53", "1.0"))
 numSlices = 4
 numSubvolumes = 1
 
@@ -128,6 +129,7 @@ logDir = "{logDir}/{sampleName}/"
   sampleInfo = """
 newSample = Sample(dataFile = "{dataFile}",
                    dataFormat = "{dataFormat}",
+                   dataUnit = {dataUnit},
                    fullName = "{sampleName}",
                    nickName = "{sampleName}",
                    dataType = "simulation",
@@ -202,6 +204,7 @@ newSample.addStack({zMin}, {zMax}, {minRadius}+18, {minRadius}+24, True, False)
 
           scriptFile.write(sampleInfo.format(dataFile=dataFileName, 
                                          dataFormat=dataFormat,
+                                         dataUnit=dataUnit,
                                          sampleName=sampleName,
                                          zMin=sliceMin,
                                          zMax=sliceMax,
diff --git a/python_tools/void_python_tools/backend/classes.py b/python_tools/void_python_tools/backend/classes.py
index 60de62f..572e543 100755
--- a/python_tools/void_python_tools/backend/classes.py
+++ b/python_tools/void_python_tools/backend/classes.py
@@ -78,7 +78,7 @@ class Sample:
                dataType="observation", numSubDivisions=2, 
                boxLen=1024, usePecVel=False, omegaM=0.27, 
                numSubvolumes=1, mySubvolume=1, dataFormat="sdss",
-               subsample="1.0", useLightCone=True):
+               subsample=1.0, useLightCone=True):
     self.dataFile = dataFile
     self.fullName = fullName
     self.nickName = nickName
diff --git a/python_tools/void_python_tools/backend/launchers.py b/python_tools/void_python_tools/backend/launchers.py
index 71d6ea3..b8cb57f 100755
--- a/python_tools/void_python_tools/backend/launchers.py
+++ b/python_tools/void_python_tools/backend/launchers.py
@@ -132,12 +132,12 @@ def launchGenerate(sample, binPath, workDir=None, inputDataDir=None,
       rangeY_max %g
       rangeZ_min %g
       rangeZ_max %g
-      subsample %g
+      subsample %s
       """ % (dataFileLine, zobovDir+"/zobov_slice_"+sampleName,
              zobovDir+"/zobov_slice_"+sampleName+".par",
              includePecVelString,
              useLightConeString,
-             sample.gadgetUnit,
+             sample.dataUnit,
              xMin, xMax, yMin, yMax,
              sample.zBoundaryMpc[0], sample.zBoundaryMpc[1],
              sample.subsample)