ABAP Static Code Analysis
A free tool to run static analysis on your custom ABAP — detect risky table access and unreleased calls, then map them to released SAP APIs. Decouple legacy systems into an upgrade-safe S/4HANA architecture.
Legacy SAP systems often have tight syntax coupling to standard tables (e.g. VBAK, BSEG, LIKP) or unreleased function modules. During an S/4HANA migration, database structures change, which breaks custom programs. Automated custom code analysis detects these dependencies and maps direct database reads to modern, cloud-released OData APIs and CAP (on SAP BTP, part of the SAP Business AI Platform) or RAP architectures, preventing upgrade blockages.
The Challenge: Custom Code as an Upgrade Blocker
In SAP ERP systems that have grown over decades, there are often thousands of lines of custom ABAP developments. Many of these directly access standard tables or unreleased SAP function modules. During an upgrade to SAP S/4HANA, this tight coupling leads to system breakages, high modernization costs, and months of testing phases.
Manual ABAP custom code analysis and subsequent refactoring is extremely time-consuming. This is exactly where the free Clean-Core.io tool comes in: it reads your legacy ABAP, runs a deterministic static code analysis, and traces data flows to isolate the dependencies automatically.
How the Automated Pipeline Works
Deterministic Static Parsing
The ABAP source is scanned deterministically with token- and rule-based static analysis. This detects control flows, database operations (SELECT, INSERT, UPDATE, MODIFY, DELETE), and external calls — before any AI runs.
SAP Cloudification Catalog
Detected table accesses are resolved against SAP's official Cloudification Repository (33,877 objects classified objects) layered with curated field-level entries. Each mapping links to the official successor with its source layer and confidence level.
Target Architecture Routing
Based on the determined degree of coupling, the router decides whether the code should be rewritten in-app in ABAP Cloud (RAP) or decoupled as a side-by-side service on SAP BTP (Node.js CAP).
What the ABAP static analysis detects
The scan surfaces the clean-core risks that most often block an S/4HANA upgrade, each as concrete, line-level evidence:
- Direct standard-table access (reads and writes to VBAK, BSEG, LIKP, KNA1 …) with the released API or CDS successor where the catalog lists one — an access without a listed successor stays marked as unresolved.
- Unreleased or not-to-be-released objects and remote function calls, checked against SAP's Cloudification Repository. A local
CALL FUNCTIONis not assessed yet, and the result lists it as not assessed. - Modifications, implicit enhancements and native SQL — the not-recommended patterns that break on upgrade.
- Dynpro / classic UI, BDC and RFC coupling that needs a redesign rather than a lift-and-shift.
Every finding is deterministic evidence for a qualified architect to review — not a black-box verdict. It is complementary to SAP ADT and ATC, not a replacement.
Benefits at a glance
- First pass in minutes, not a workshop
- Released successors where SAP names one
- Level A–D (or Unknown) for each SAP object used
- Reduces technical upgrade debt
Related Topics
ABAP static analysis tools compared
Which tool answers which question — as of 2026-10. Each row states what the tool's own public documentation says; check it there for your version. They are not alternatives to each other so much as answers to different questions, and several of them belong in the same programme.
| Tool | What it does | Where it is stronger | Next to Clean-Core.io |
|---|---|---|---|
| ABAP Test Cockpit (ATC) and Code Inspector (SAP) | What it doesSAP’s check framework inside the ABAP system. Code Inspector provides the checks, ATC runs them for developers and centrally, including readiness checks for SAP S/4HANA and for ABAP Cloud, with an exemption process for accepted findings. | Where it is strongerIt is the authority. It runs in your system and sees what an outside tool cannot: the dictionary, where-used lists and the release state of every object for your release. | Next to Clean-Core.ioClean-Core.io reads the same Cloudification Repository outside the system and shows its reading as Level A–D. Confirm with ATC; ATC results can be imported to compare them with the engine. |
| abaplint (open source) | What it doesA linter for ABAP under the MIT licence, written in TypeScript. It reads code serialized with abapGit and runs on the command line, in CI pipelines and in VS Code, with its rules configured per repository. | Where it is strongerFast, scriptable checks on every commit, outside any SAP system, across a whole repository — syntax, style and correctness rules a team can make a gate. | Next to Clean-Core.ioDifferent questions: abaplint checks how a repository is written; Clean-Core.io explains what one program does and carries that to a decision. |
| OWASP ABAP Code Scanner (open source) | What it doesA static application security testing tool for ABAP from an OWASP project, under the MIT licence: a Python command-line scanner for exported ABAP source that runs offline, with checks for injection, hard-coded secrets, weak cryptography and insecure dynamic statements. Commercial editions are offered by RedRays. | Where it is strongerSecurity. It looks for vulnerabilities, which Clean-Core.io does not check for at all. | Next to Clean-Core.ioRun it for security findings; Clean-Core.io adds the process, Level A–D and the decision for the same program. |
| SonarQube (SonarSource) | What it doesA code quality and security platform. ABAP analysis is part of its commercial editions, not of the free Community Build, with rules for bugs, maintainability and vulnerabilities, quality gates and dashboards. | Where it is strongerContinuous quality over a whole code base and many languages, with quality gates in the pipeline and a history per project. | Next to Clean-Core.ioDifferent scope: SonarQube tracks code quality over time; Clean-Core.io answers what happens to one custom program in a clean core programme. |
| Clean-Core.io | What it doesA free web workspace for one custom ABAP program: the process as BPMN with line anchors, Level A–D for each SAP object it uses (or Unknown), one decision — keep, rebuild, move to SAP standard or retire — then a design, a code draft and tests, sealed as a signed run. | Where it is strongerExplaining to the business what a program does and carrying the same evidence to a decision, with what it could not determine named. | Next to Clean-Core.ioIt is not a security scanner, not a linter for a whole repository and not the authority on release state; it reads uploaded source, not your system. |
Frequently Asked Questions (FAQ)
Why do classic S/4HANA upgrades fail?
Many SAP systems exhibit tight coupling between custom ABAP code and standard SAP tables. During upgrades, these underlying data structures change, leading to system errors and massive testing efforts.
How does automated ABAP analysis help?
The analysis isolates modifications in the ABAP code and automatically maps direct access to tables like VBAK, LIKP, or BSEG to their official successors via SAP's Cloudification Repository, layered with curated field-level entries — decoupling the system deterministically.
Is there a free ABAP static code analysis tool?
Yes. Clean-Core.io runs free static analysis of custom ABAP in the browser — no install. It parses your code deterministically, flags risky table access, unreleased calls and modifications, and maps them to released SAP APIs. It is a free community tool, complementary to SAP ADT and ATC.
How do I find custom code that will break an S/4HANA upgrade?
Run a static analysis that checks each database access and API call against SAP's released-object contract (the Cloudification Repository). Direct writes to standard tables, unreleased or not-to-be-released objects, modifications and native SQL are the usual upgrade blockers — the analysis surfaces them as line-level evidence so you can prioritise remediation.
Does static ABAP analysis replace SAP ATC?
No — it is complementary. SAP ATC (ABAP Test Cockpit) stays the authoritative in-system check. Clean-Core.io gives a fast, free first-pass assessment plus a target-architecture and remediation view around those findings; always verify with SAP ADT/ATC before acting.
What ABAP code analysis tools are available?
The authoritative, in-system tools are SAP ABAP Test Cockpit (ATC) with Code Inspector, and ABAP Development Tools (ADT), which run inside your SAP system. Outside the system there are abaplint, an open-source linter for code serialized with abapGit; the OWASP ABAP Code Scanner, an open-source security scanner for exported source; and SonarQube, whose commercial editions analyse ABAP for code quality and security. Clean-Core.io is a free, browser-based workspace for one program: it parses the ABAP deterministically, reconstructs the process, grades each SAP object Level A–D (Unknown where SAP’s published data holds no answer) and leads to a decision. Confirm findings with ATC for your target release.
Can it identify unused or dead ABAP custom code?
Static analysis flags the risky and non-compliant patterns — direct standard-table access, unreleased or not-to-be-released objects, modifications and native SQL — and objects that have no released successor. Detecting genuinely unused (dead) code, however, needs runtime usage data, which comes from SAP's ABAP Call Monitor (SCMON) / Usage & Procedure Logging inside the system. The two are complementary: static analysis tells you what is risky, runtime usage tells you what is actually still called.
How do I plan SAP custom code remediation?
Prioritise by risk. Use the A–D readiness grade to fix the highest-risk objects first, re-point direct table reads to released CDS views or OData APIs, and route the remaining logic to in-app ABAP Cloud (RAP) or side-by-side CAP on SAP BTP, part of the SAP Business AI Platform. Objects with no released path are flagged for re-architecture rather than a drop-in successor. Every step is deterministic evidence for an architect to confirm with SAP ADT/ATC.