Dear sir or madam, we are trying to update version  8110  up to 8212 in the following way.
1. Update Version 8110 with updatemanager.sh to version 8121 by package ManageEngine_ServiceDesk_Plus_8_1_0_SP-0_21_0.ppm
2. Run full backup of updated version 8121 with backupdata.sh.
3. Install ManageEngine_ServiceDesk_Plus_8121.bin apart.
4. Restore backup data from point 2 on newly installed version 8121.
I must say we succeeded so far.
Then we are trying to do the same way to update version 8121 to 8200.
(use ManageEngine_ServiceDesk_Plus_8_1_0_SP-1_0_0.ppm )
On the fourth point we get the following error (we would be grateful if you gave us any recommendations)

linux-hlbl:/mnt/8200/ServiceDesk/bin # ./restoreData.sh -c /mnt/8200/ServiceDesk/backup/backup_mysql_8200_fullbackup_09_24_2013_10_15.data
*********************************************************************************
                         Restore DB Setup Wizard
*********************************************************************************

Execute Restore DB Utility from command prompt

        For Windows users :
                bin>restoreData -c [backup file]

        For Linux users :
                bin]#sh restoreData.sh -c [backup file]

*********************************************************************************
FYI [SEVERE]: Please don't kill this utility until the operation is completed
Sep 24, 2013 2:57:26 PM com.adventnet.servicedesk.server.utils.SDDataManager setStandAlone
INFO: Going to set the standAlone param as : true
Sep 24, 2013 2:57:26 PM com.adventnet.servicedesk.server.utils.SDDataManager setStandAlone
INFO: Going to reset rootDir using server.dir
Sep 24, 2013 2:57:26 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: rootDir :: .
Sep 24, 2013 2:57:27 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: netutilsData :: {RELEASE={version=8.2.0}, BUILD={number=8200}}
Sep 24, 2013 2:57:27 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: rebrandData :: {OPMANAGER={name=OpManager}, PRODUCT={name=ManageEngine ServiceDesk Plus}, ADMANAGER={name=ADManager}}
Extracting backup file....

Please wait extracting backup file
Sep 24, 2013 2:57:27 PM com.adventnet.updatemgr.util.ConfUtils stopDB
INFO: dbadapter :: [null], startDBServer :: [false], dbProp :: null
Exception in thread "main" java.lang.OutOfMemoryError
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(Unknown Source)
        at java.util.zip.ZipFile.<init>(Unknown Source)
        at com.adventnet.servicedesk.tools.RestoreSDBackup.extractBackupFile(RestoreSDBackup.java:1022)
        at com.adventnet.servicedesk.tools.RestoreSDBackup.deCompressData(RestoreSDBackup.java:1017)
        at com.adventnet.servicedesk.tools.RestoreSDBackup.restoreDatabase(RestoreSDBackup.java:186)
        at com.adventnet.servicedesk.tools.RestoreSDBackup.main(RestoreSDBackup.java:138)
        at com.adventnet.servicedesk.tools.RestoreDialog.main(RestoreDialog.java:319)
linux-hlbl:/mnt/8200/ServiceDesk/bin #