MEGA Giving hundreds of errors when Batch-Importing with API

[alros]

We are importing large amounts of data into MEGA. After some time errors of the following form turn up repeatedly and often:

* -- MEGA Session (MEGA 2009 Service Pack 5 patch 11 0725.3903) -- *   Date: 2015/05/19 15:05:52

     System   : Windows 7 Service Pack 1 (Build 7601). IE: 9.11.9600.17728.

     Site     : arag it   (c:\program files (x86)\mega\mega 2009 sp5\system)   de PID(00001ca8)

     Location : C:\Users\****\AppData\Local\Mega

Erroneous Alias Link between Link "Ordner von Elementen.Unterordner" and Sub(Restricting) Link"Ordner Anwendungen.Unterordner". The attribute "Assoziatives Objekt" on the Sub Link doesn't exist for the Alias Link .

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:07:04

             Access already freed : 65b36d10

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:07:33

             Access already freed : 8fb44a8

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:07:57

             Access already freed : 90c3208

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:07:57

             Access already freed : 90c7a38

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:07:57

             Access already freed : 90c06b8

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:07:57

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:07:57

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:07:57

             native exception attempting a COM Release()

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:08:18

             Access already freed : 65a329d0

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:08:30

             Access already freed : 8e4a110

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:08:35

             Access already freed : 8f4fe50

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:09:17

             Access already freed : 905b398

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:09:22

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:09:58

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:09:58

             native exception attempting a COM Release()

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:10:10

             Access already freed : 65b203b0

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:10:22

             Access already freed : 65b374a0

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:10:22

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:11:12

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:11:12

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:11:27

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:11:37

             native exception attempting a COM Release()

Thread(0380);rpgbmses.cpp(634) : error Private: 0x0000FFFF 15:11:39

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x07654a68   at

               address 0x7654a68 : GenericProviderCreate+0xa1e

>>> See Dump File : C:\Users\****\AppData\Local\Mega\MDMgad.dmp

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:11:49

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:12:11

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:12:35

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:12:35

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:12:53

             native exception attempting a COM Release()

Thread(0380);accapi.cpp(848) : error Application: 0x01008012 15:12:53

             Access already freed : 5250f448

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:12:53

             native exception attempting a COM Release()

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:13:08

             Access already freed : 8fb50b0

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:13:08

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:13:12

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:13:37

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:13:41

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:13:43

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:14:07

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:14:37

             native exception attempting a COM Release()

Thread(19b4);accapi.cpp(848) : error Application: 0x01008012 15:14:43

             Access already freed : 8fb1fe0

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:14:54

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:15:59

             native exception attempting a COM Release()

Thread(19b4);javautil.cpp(1336) : error Private: 0x00008012 15:16:15

             native exception attempting a COM Release()

Thread(0380);rpgbmses.cpp(481) : error Private: 0x0000FFFF 15:16:15

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x0764b8cf   at

               address 0x764b8cf : RpTextFmtSave+0x3390

>>> See Dump File : C:\Users\****\AppData\Local\Mega\MDMgae.dmp

Thread(0380);rpgbmses.cpp(634) : error Private: 0x0000FFFF 15:16:19

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x0764b914   at

               address 0x764b914 : RpTextFmtSave+0x33d5

>>> See Dump File : C:\Users\****\AppData\Local\Mega\MDMgaf.dmp

Thread(0380);rpgbmses.cpp(481) : error Private: 0x0000FFFF 15:16:22

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x0764b8cf   at

               address 0x764b8cf : RpTextFmtSave+0x3390

>>> See Dump File : C:\Users\****\AppData\Local\Mega\MDMgb0.dmp

Thread(0380);rpgbmses.cpp(634) : error Private: 0x0000FFFF 15:16:25

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x0764b87d   at

               address 0x764b87d : RpTextFmtSave+0x333e

>>> See Dump File : C:\Users\****\AppData\Local\Mega\MDMgb1.dmp

Thread(0380);rpgbmses.cpp(634) : error Private: 0x0000FFFF 15:16:27

             exception 0xc0000005: EXCEPTION_ACCESS_VIOLATION try to read at 0x0764b87d   at

               address 0x764b87d : RpTextFmtSave+0x333e

(

Why do these errors occur? "Access already freed" suggests that MEGA unilaterally discards some objects we still want to use.

How can we cleanly do such a batch import process? It involves creating large amounts of Objects of different MetaClasses, setting their properties and linking them. Currently we obtain a MegaCurrentSession, invoke its getRoot() to get a MegaRoot from wich we add objects via

root.getCollection("MetaClassName").add("ObjectName")

and then work with the MegaObjects via

obj.setProp("PropertyName", "PropertyValue");
MegaCollection coll = obj.getCollection("MetaAssociationName").filter("MetaClassName").add(linkedObj);