SUM DMO table comparision checksum error

While using SUM DMO for SAP system migration, DMO compares tables within the process of migration. Irrespectof you chose the table compariso option, it compares the tables within the execution phase and it's going to result with checksum errors.

This article provides us the  procedure to investigate and fix table comparison row count checksum error

Check the log file MIGRATE_DT_CHECKDIFF.LST which exists under the SUM log file location.

Change to the SUM log directoy

more MIGRATE_DT_CHECKDIFF.LST

BALDAT and BALHDR are the 2 tables which got checksum errors.

Proceeded as below

/usr/sap//SUM/abap/load/migrate_dt]# grep -i BALDAT *

MIGRATE_DT_CHECKDIFF.LST:BALDAT # old: 14156352 new: 14156348

MIGRATE_DT_CNT_00003_BALDAT_EXP.IN:cp "BALDAT"

MIGRATE_DT_CNT_00003_BALDAT_EXP.LOG:2 ETQ399 Counted 1 tables out of 1, written to '/usr/sap//SUM/abap/load/migrate_dt/MIGRATE_DT_CNT_00003_BALDAT_EXP.OUT'.

MIGRATE_DT_CNT_00003_BALDAT_EXP.OUT:BALDAT 14156352

MIGRATE_DT_CNT_00003_BALDAT.FLAG:# Export for bucket 00003_BALDAT finished at 2019/07/29 14:18:32.

MIGRATE_DT_CNT_00003_BALDAT.FLAG:"MIGRATE_DT_CNT_00003_BALDAT_EXP.OUT";16

MIGRATE_DT_CNT_00003_BALDAT_IMP.IN:cp "BALDAT" "BALDAT"

MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT:BALDAT 14156348

MIGRATE_DT_CNT.BUC:count: refid=00003_BALDAT export=MIGRATE_DT_CNT_00003_BALDAT_EXP.IN import=MIGRATE_DT_CNT_00003_BALDAT_IMP.IN size=8897208 estruntime=8689 expntasks=1 impntasks=1

·   Replace 14156352 with 14156348 in file MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT.

·       Before editing this file, take a copy of existing one.

[root@/usr/sap//SUM/abap/load/migrate_dt]# cp -p MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT_ORIG



Just checking if the copy has been created

[root@/usr/sap//SUM/abap/load/migrate_dt]# ls -lart MIGRATE_DT_CNT_00003_BALDAT_IMP*

-rw-r--r-- 1 adm sapsys 21 Jul 29 14:18 MIGRATE_DT_CNT_00003_BALDAT_IMP.IN

-rw-r--r-- 1 adm sapsys 16 Jul 29 18:19 MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT_ORIG

-rw-r--r-- 1 adm sapsys 16 Jul 29 18:19 MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT

[root@/usr/sap//SUM/abap/load/migrate_dt]#



Now Edit the file

[root@/usr/sap//SUM/abap/load/migrate_dt]# vi MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT



Content of the file

Changing it to 14156352

Save and exit

[root@/usr/sap//SUM/abap/load/migrate_dt]# cat MIGRATE_DT_CNT_00003_BALDAT_IMP.OUT

BALDAT 14156352

[root@/usr/sap//SUM/abap/load/migrate_dt]#



Now allow us to check if BALDAT checksum error is fixed by retrying the phase.

It should show checksum error only for BALHDR

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# view /usr/sap/<SAPSID>/SUM/abap/load/migrate_dt/MIGRATE_DT_CHECKDIFF.LST

It is showing BALHDR only

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# grep -i BALHDR MIGRATE_DT_CNT*

MIGRATE_DT_CNT_00038_EXP.IN:cp "BALHDRP"

MIGRATE_DT_CNT_00038_EXP.OUT:BALHDRP 0

MIGRATE_DT_CNT_00038_IMP.IN:cp "BALHDRP" "BALHDRP"

MIGRATE_DT_CNT_00038_IMP.OUT:BALHDRP 0

MIGRATE_DT_CNT_00134_EXP.IN:cp "BALHDR"

MIGRATE_DT_CNT_00134_EXP.OUT:BALHDR 2323031

MIGRATE_DT_CNT_00134_IMP.IN:cp "BALHDR" "BALHDR"

MIGRATE_DT_CNT_00134_IMP.OUT:#BALHDR 2323030

MIGRATE_DT_CNT_00134_IMP.OUT:BALHDR 2323030

Edit file MIGRATE_DT_CNT_00134_EXP.OUT replacing 2323031 with 2323030

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# cp -p MIGRATE_DT_CNT_00134_EXP.OUT MIGRATE_DT_CNT_00134_EXP.OUT_ORIG

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# ls -lart MIGRATE_DT_CNT_00134_EXP*

-rw-r--r-- 1 <SAPSID>adm sapsys 442 Jul 29 14:18 MIGRATE_DT_CNT_00134_EXP.IN

-rw-r--r-- 1 <SAPSID>adm sapsys 374 Jul 29 14:19 MIGRATE_DT_CNT_00134_EXP.OUT_ORIG

-rw-r--r-- 1 <SAPSID>adm sapsys 374 Jul 29 14:19 MIGRATE_DT_CNT_00134_EXP.OUT

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]#

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# vi MIGRATE_DT_CNT_00134_EXP.OUT

Replacing 2323031 with 2323030

Save and exit

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]# cat MIGRATE_DT_CNT_00134_EXP.OUT

BALHDR 2323030

CNVLTRL_PORTION 0

ITS_POS 0

RSDRCRM_SEG_TEST 0

TBE32T 1

/BOFU/DPPFCNTR 0

CME_ST_R3_ATTRH 0

IUUC_2RX_ALP 0

RSCNV_BUFFER_CHA 0

TDBSELVER 0

/BCV/C_CONF_XC 0

CNVLTRL_PAR_JOBS 0

ITS_SHOW 0

RSDRCRM_SEG_QSI 0

TBE34 0

/BOFU/DO_CUST 0

CME_ST_R3_DEP 0

IUUC_2RX_ACCR 0

RSCNV_BUFFER_MAP 0

TDATS 0

/BCV/C_DASHBA 48

CNVLTRL_PARAM 0

ITS_STYLES 0

RSDRCRM_SEG_PARA 0

TBEPRI 0

[root@<hostname>/usr/sap/<SAPSID>/SUM/abap/load/migrate_dt]#

Retry the phase now

It has passed the error.