fix: PostPlot must use draw_in_this_thread

Python_script/PostPlot.py

@@ -64,7 +64,7 @@ class PostPlot:
         postplot_data_frame.update(time_vals) 
         
         # refresh subplots with data in data frame
-        self.measplot.draw(postplot_data_frame, pdf_name='')
+        self.measplot.draw_in_this_thread(postplot_data_frame, pdf_name='')
         
         # cal PK2PK values of magnitude and phase 
         PK2PK = self.calc_pkpk_values(postplot_data_frame)
@@ -188,4 +188,4 @@ if __name__ == '__main__':
     filename = 'Full_Transition' + '.pdf'
     plot_obj.save_fig(storepath, filename)
 
-  
\ No newline at end of file
+