Troubleshooting Homogeneous System Copy Failures on SAP NetWeaver 7.4: A Methodical Approach

Drawing from decades on the ground, here’s how to isolate and fix the root cause when a homogeneous copy goes off the rails.

I’ve lost count of the 2 AM calls where a “homogeneous” system copy has stalled. As a basis lead on a large rollout in 2015, I recall walking into the war room after a fresh ERP 6.0 EHP7 export had been churning for six hours only to fail with a cryptic R3load exit code. The junior admin had already started rebuilding the entire source export—a classic overreaction. The fix turned out to be a 30-second adjustment to the target database buffer pool. Stopping the panic and reading the exact error message is the first lesson I drill into every team.

The Real Story

A homogeneous system copy (same OS, same DB version, same SAP release) should be a scripted, low-risk operation. In practice, subtle mismatches and resource constraints cause most failures. The root of the problem is rarely a bug in SAPinst or R3load; it’s almost always an environmental detail we assumed was identical.

The single most important diagnostic step: identify the exact error message from the failing component. The error might appear in the SAPinst central log, in a *.log file under the export or import working directory, or in the database alert log. Without that line, you’re troubleshooting blind. For instance, if R3load returns exit code 2, you need to look at the specific *.log file for the package that stopped. You’ll often see messages like:

(DB) ERROR: DDL statement failed
  (DROP TABLE "SAPSR3"."T000")
  DbSlExecute: rc = 99
(SQL error 1653)

That error points to a full tablespace, not a corrupt dump. Yet I’ve seen teams restart the entire export because they didn’t parse the SQL error code.

Common hidden culprits:

• Kernel patch level mismatch. Even a seemingly minor difference—say, source on K_740_REL level 400, target on 401—can cause silent import aborts. The export might complete, but the import of some ABAP loads fails because the R3load binary encodes version-dependent compression.
• Support package stack deltas. A homogeneous copy requires the same software component versions and patch levels. If the source has a few SPAM/SAINT updates applied after the last export, the target import will hit version inconsistencies, especially in repository objects.
• Database tablespace sizing. The export often records only the used space, but the import may demand contiguous extents or a larger initial extent than what the target tablespace can provide.

What This Means for You

For a basis practitioner staring at a failed copy, you need a methodical checklist before you launch another job.

Start with the logs. In the SAPinst directory, locate sapinst_dev.log or the sapinst.log. Search for “ERR” and “ERROR” (case-insensitive). The relevant R3load logs sit under the import directory, typically named SAPSR3.lst and individual package .log files. Use:

awk '/^.*ERROR|error|ERR/{print FILENAME": "$0}' *.log

to scan across all logs.

Verify true homogeneity. On the source and target application servers, run:

disp+work -version | grep -E "patch number|kernel release"

Compare the kernel patch level and the database client library version. I’ve seen cases where the DB client on the target was a minor release older, causing R3load to misinterpret decimal separators in table data. Also check if both systems use the same Unicode or non-Unicode encoding; NW 7.4 supports both, and a mismatch will produce garbage characters without a clear error.

Validate export/import consistency. If the export used R3szchk to estimate sizes, review the generated SQL files. On the target database, ensure:

• Tablespace autoextend is enabled, or you’ve preallocated enough space.
• The schema owner (typically SAPSR3) has quota unlimited, and the DB user used by R3load has the ALTER ANY TABLE privilege.

I recall a production copy that failed because the target database’s DB_FILES parameter was too low; R3load couldn’t create a new datafile for the PSAPUNDO tablespace.

Consult SAP Note 885171. This is the master note for homogeneous system copies. It covers pre-checks, authorization requirements, and known issues like missing SAP user rights or incorrect profile parameters (rdisp/wp_no_dia set too low). Keep a local copy handy; you’ll use it every time.

Action Items

• Capture the exact error. Use grep -i "error" on the latest job log. Do not proceed without the error text.
• Match kernel and DB client levels. Run the version command on source and target; document any deviation, no matter how small.
• Check tablespace space and autoextend. For Oracle:

  SELECT tables
  

References

• SAP system copy error- SAP Community Hub
• SAP News Center

References

• SAP News Center
• SAP system copy error
• SAP Community Hub