diff --git a/contrib/stack/stripmapStack/Stack.py b/contrib/stack/stripmapStack/Stack.py
index 995cce3..276494e 100755
--- a/contrib/stack/stripmapStack/Stack.py
+++ b/contrib/stack/stripmapStack/Stack.py
@@ -2,7 +2,7 @@
 
 #Author: Heresh Fattahi
 
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
 import datetime
diff --git a/contrib/stack/stripmapStack/invertMisreg.py b/contrib/stack/stripmapStack/invertMisreg.py
index f6e7000..8be7e93 100755
--- a/contrib/stack/stripmapStack/invertMisreg.py
+++ b/contrib/stack/stripmapStack/invertMisreg.py
@@ -2,10 +2,10 @@
 
 # Author: Heresh Fattahi
 
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
-import  datetime
+import datetime
 import time
 import numpy as np
 import shelve
diff --git a/contrib/stack/stripmapStack/invertOffsets.py b/contrib/stack/stripmapStack/invertOffsets.py
index 7fa1293..9f13221 100755
--- a/contrib/stack/stripmapStack/invertOffsets.py
+++ b/contrib/stack/stripmapStack/invertOffsets.py
@@ -2,10 +2,10 @@
 
 #Author: Heresh Fattahi
 
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
-import  datetime
+import datetime
 import time
 import numpy as np
 import shelve
diff --git a/contrib/stack/stripmapStack/stackStripMap.py b/contrib/stack/stripmapStack/stackStripMap.py
index 09749e4..67b1657 100755
--- a/contrib/stack/stripmapStack/stackStripMap.py
+++ b/contrib/stack/stripmapStack/stackStripMap.py
@@ -2,7 +2,7 @@
 
 #Author: Heresh Fattahi
 
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
 import datetime
diff --git a/contrib/stack/topsStack/invertMisreg.py b/contrib/stack/topsStack/invertMisreg.py
index 56551d1..9ee8444 100755
--- a/contrib/stack/topsStack/invertMisreg.py
+++ b/contrib/stack/topsStack/invertMisreg.py
@@ -3,10 +3,10 @@
 #Author: Heresh Fattahi
 #Copyright 2016
 ######################
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
-import  datetime
+import datetime
 import time
 import numpy as np
 #################################################################
diff --git a/contrib/stack/topsStack/plotMisreg.py b/contrib/stack/topsStack/plotMisreg.py
index b0ce63e..7d7b25c 100755
--- a/contrib/stack/topsStack/plotMisreg.py
+++ b/contrib/stack/topsStack/plotMisreg.py
@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
 ########################
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
-import  datetime
+import datetime
 import time
 import numpy as np
 import matplotlib.pyplot as plt
diff --git a/contrib/stack/topsStack/sentinelApp.py b/contrib/stack/topsStack/sentinelApp.py
index 00d7c81..1ef0c7b 100755
--- a/contrib/stack/topsStack/sentinelApp.py
+++ b/contrib/stack/topsStack/sentinelApp.py
@@ -6,10 +6,10 @@
 
 #######################
 
-import os, imp, sys, glob
+import os, sys, glob
 import argparse
 import configparser
-import  datetime
+import datetime
 import numpy as np
 import isce
 import isceobj
diff --git a/contrib/timeseries/prepStackToStaMPS/bin/make_single_reference_stack_isce b/contrib/timeseries/prepStackToStaMPS/bin/make_single_reference_stack_isce
index c1f70f8..a6dd4cf 100755
--- a/contrib/timeseries/prepStackToStaMPS/bin/make_single_reference_stack_isce
+++ b/contrib/timeseries/prepStackToStaMPS/bin/make_single_reference_stack_isce
@@ -89,7 +89,7 @@ if (( "$slc_stack_path" == "" ) || ( "$reference_date" == "" ) || ( "$lambda" ==
 endif
 
 # make sure the slash is added in case the variable is not empty
-set slc_stack_path = `echo ${slc_stack_path}/`
+set slc_stack_path = `echo ${slc_stack_path}`
 echo 
 echo -------------------------------                                                                                                             
 echo Stack path is: $slc_stack_path