I'm not seeing any sort of crash, just a failure when calling the TableToTable Tool:>>>
Traceback (most recent call last):
File "C:\...\AssemblyCache\{7E4CFC40-D898-41B3-8BBB-0B634DC2B183}\EsriAddin_addin.py", line 32, in onClick
arcpy.TableToTable_conversion(NullServiceAddresses, Null_Services, "NullServiceAddresses.dbf", "", "ANCILLARYR \"ANCILLARYR\" true true false 2 Short 0 4 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,ANCILLARYROLE,-1,-1;ENABLED \"ENABLED\" true true true 2 Short 0 4 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,ENABLED,-1,-1;WSA \"WSA\" true true false 3 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,WSA,-1,-1;SYNERGEN_I \"SYNERGEN_ID\" true true false 17 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,SYNERGEN_ID,-1,-1;LIFECYCLES \"LifecycleStatus\" true true false 4 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,LIFECYCLESTATUS,-1,-1;LASTEDITOR \"LASTEDITOR\" true true false 10 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,LASTEDITOR,-1,-1;LASTEDITDA \"LASTEDITDA\" true true false 36 Date 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,LASTEDITDATE,-1,-1;LASTEDITSO \"LastEditSource\" true true false 4 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,LASTEDITSOURCE,-1,-1;DOCUMENTNU \"DOCUMENTNU\" true true false 255 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,DOCUMENTNUMBER,-1,-1;INSTALLYEA \"INSTALLYEAR\" true true false 2 Short 0 4 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,INSTALLYEAR,-1,-1;OWNERSHIP \"Ownership\" true true false 4 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,OWNERSHIP,-1,-1;STREETDIR \"STREETDIR\" true true false 3 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,STREETDIR,-1,-1;STREETNO \"STREETNO\" true true false 15 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,STREETNO,-1,-1;STREETNAME \"STREETNAME\" true true false 50 Text 0 0 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,STREETNAME,-1,-1;SERVICESUB \"ServiceSubtype\" true true false 4 Long 0 5 ,First,#,\\ADMIN.PotableNetwork\\ADMIN.Service,SERVICESUBTYPE,-1,-1", "")
File "c:\arcgis\arcpy\arcpy\conversion.py", line 2018, in TableToTable
raise e
ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Rows: Dataset NullServiceAddresses does not exist or is not supported
Failed to execute (TableToTable).
>>> Perhaps add some print statements in your onClick implementation to see how far the tool gets and where it crashes on your local machine?
