diff --git a/schainpy/__init__.py b/schainpy/__init__.py
index b93e097..87a5e06 100644
--- a/schainpy/__init__.py
+++ b/schainpy/__init__.py
@@ -5,4 +5,4 @@ try:
 except:
     pass
 
-__version__ = '3.0.0b1'
+__version__ = '3.0.0b2'
diff --git a/schainpy/model/data/jrodata.py b/schainpy/model/data/jrodata.py
index 258e7e1..9878ea1 100644
--- a/schainpy/model/data/jrodata.py
+++ b/schainpy/model/data/jrodata.py
@@ -1363,7 +1363,7 @@ class PlotterData(object):
         Return the list of times of the current data
         '''
 
-        ret = numpy.array([*self.data[self.key]])
+        ret = numpy.array([t for t in self.data[self.key]])
         if self:
             ret.sort()
         return ret
diff --git a/schainpy/model/graphics/jroplot_base.py b/schainpy/model/graphics/jroplot_base.py
index f3582ce..2f271e2 100644
--- a/schainpy/model/graphics/jroplot_base.py
+++ b/schainpy/model/graphics/jroplot_base.py
@@ -5,7 +5,10 @@ import zmq
 import time
 import numpy
 import datetime
-from queue import Queue
+try:
+    from queue import Queue
+except:
+    from Queue import Queue
 from functools import wraps
 from threading import Thread
 import matplotlib
diff --git a/schainpy/model/proc/jroproc_base.py b/schainpy/model/proc/jroproc_base.py
index 62cb9d6..b359d8a 100644
--- a/schainpy/model/proc/jroproc_base.py
+++ b/schainpy/model/proc/jroproc_base.py
@@ -9,10 +9,6 @@ import zmq
 import time
 import pickle
 import traceback
-try:
-    from queue import Queue
-except:
-    from Queue import Queue
 from threading import Thread
 from multiprocessing import Process, Queue
 from schainpy.utils import log