Copying an object with attachments from a distributed database to a distributed one

I wrote a addins to transfer selected objects from one distributed database to another. Each layer participates in a geographic service (MapService). The program works successfully sometimes, and sometimes it hangs for a long time and nothing happens. Any suggestions on how to make the script work stable?

# -*- coding: cp1251 -*-
import arcpy
import pythonaddins
import sys

class CopyToArchiv(object):
    """Implementation for script_addin.CopyToArchiv (Button)"""
    def __init__(self):
        self.enabled = True
        self.checked = False
        
            
    def onClick(self):
        
        global staticVal # the first layer with attachments
        global staticVal_arch # the second layer to archive the objects from the first layer
        
        arcpy.env.overwriteOutput = True
        
        mxd = arcpy.mapping.MapDocument('current')
        layer1 = arcpy.mapping.Layer(staticVal)
        layer2 = arcpy.mapping.Layer(staticVal_arch)

        staticVal_arch_f=layer2.datasetName
        #workspace
        worksps1=layer1.dataSource[:(layer1.dataSource.lower()).find(".sde")]+".sde\\"
        worksps2=layer2.dataSource[:(layer2.dataSource.lower()).find(".sde")]+".sde\\"
        
        field_names2 = [f.name for f in arcpy.ListFields(layer2)]
        if "ID_SAVE" in field_names2:
            pass
        else:
            answer = pythonaddins.MessageBox(u'There is no ID_SAVE field! Add?', u'Message', 4)
            if answer == 'Yes':
                arcpy.AddField_management(layer2,"ID_SAVE","LONG")
            else:
                pythonaddins.MessageBox(u'Exit', u'Message', 0)
                sys.exit()
            
        #calculate field ID_SAVE=lID
        arcpy.CalculateField_management(layer2,"ID_SAVE","!OBJECTID!","PYTHON")

        #check the ID numbers of selected objects 
        list_GID=''
        with arcpy.da.SearchCursor(layer1, "OBJECTID") as cursor:
            for row in cursor:
                list_GID=list_GID+str(row[0])+','
        list_GID=list_GID[:len(list_GID)-1]
        list_GID='('+list_GID+')'
        
        #copy objects from one layer to another
        fieldmappings = arcpy.FieldMappings()
        fieldmappings.addTable(layer2)
            
        fieldmap = fieldmappings.getFieldMap(fieldmappings.findFieldMapIndex("ID_SAVE"))
        fieldmap.addInputField(layer1, "OBJECTID")
        fieldmappings.replaceFieldMap(fieldmappings.findFieldMapIndex("ID_SAVE"), fieldmap)

        arcpy.Append_management(layer1,layer2,"NO_TEST",fieldmappings)
        
        layer2_attach=worksps2+layer2.datasetName+"__ATTACH"
        layer1_attach=worksps1+layer1.datasetName+"__ATTACH"
        try:
            arcpy.Delete_management("layer1_attach")
        except arcpy.ExecuteError: 
            msgs = arcpy.GetMessages(2) 
            pythonaddins.MessageBox(msgs, u"Error", 0)

        arcpy.MakeTableView_management(layer1_attach,"layer1_attach","REL_OBJECTID in " + list_GID)

        arcpy.Append_management("layer1_attach", layer2_attach, "NO_TEST")

        try:
            arcpy.Delete_management("layer2_attach")
        except arcpy.ExecuteError: 
            msgs = arcpy.GetMessages(2) 
            pythonaddins.MessageBox(msgs, u"Error", 0)
            
        arcpy.MakeTableView_management(layer2_attach,"layer2_attach")
        arcpy.AddJoin_management("layer2_attach","REL_OBJECTID",layer2,"ID_SAVE","KEEP_COMMON")

        #calculate in attachments2 rel_ID=ID(from layer2)
 
        arcpy.CalculateField_management("layer2_attach", "REL_OBJECTID", "!" + staticVal_arch_f + ".OBJECTID!", "PYTHON")
        #удаляем связь
        arcpy.RemoveJoin_management("layer2_attach")
        #
        try:
            arcpy.Delete_management("layer1_attach")
            arcpy.Delete_management("layer2_attach")
        except arcpy.ExecuteError: 
            msgs = arcpy.GetMessages(2) 
            pythonaddins.MessageBox(msgs, u"Error", 0)