DATA_OFFSET_LENGTH_TOO_LARGE — Field Offset Plus Length Exceeds Object Length

The dump belongs to a family of runtime checks that ABAP performs whenever offset and length in a field access (field+off(len)) are not both literal constants known at compile time. When either value is a variable, the kernel checks at execution time whether offset plus length still fits inside the target object's length. If it does not, the program terminates with DATA_OFFSET_LENGTH_TOO_LARGE. This is distinct from a plain syntax check failure: the code compiles and runs fine for most input, then blows up only when a particular value of offset or length pushes past the boundary. In newer ABAP this condition is represented internally as a range violation and can be caught with TRY/CATCH around CX_SY_RANGE_OUT_OF_BOUNDS if the developer anticipated it; when nobody does, it surfaces as this uncaught dump.

If the cause is a parsing routine driven by a missing or misplaced delimiter, add an explicit check before the offset access: verify the search succeeded and that offset plus length does not exceed strlen(field) before extracting, and decide what the code should do when the input does not match the expected format. If the cause is a dictionary length change, trace every hardcoded or semi-hardcoded offset against that field and correct the arithmetic; this requires a transportable code change and should go through a formal correction, not a quick edit in production. If the cause is short or truncated interface records, the ABAP fix is defensive padding or a length check before extraction, but the underlying data quality issue on the sending side should also be raised with the interface or functional owner so it does not keep recurring. If the cause is unicode byte/character mismatch, replace byte-oriented offset logic with character-based string functions. Any fix that changes shared logic used by multiple callers needs regression testing across those callers before transport.

The reflex fix is to wrap the offending statement in a TRY/CATCH for CX_SY_RANGE_OUT_OF_BOUNDS, or in older code to widen the target field's length in the dictionary, and move on. Catching the exception without handling the underlying condition means the program now silently skips or truncates records that would previously have dumped, which trades a visible crash for a quiet data quality problem that surfaces weeks later in a reconciliation report. Widening the field length only postpones the failure until the offset variable grows again, and does nothing about the parsing logic that produced an invalid offset in the first place.

Any offset or length built from a variable, a FIND result, or an external field's length should be checked against strlen or the target's declared length before use, with an explicit branch for the not-found or too-short case. Prefer built-in string functions such as substring and split over manual offset arithmetic where the logic allows it, since these raise controlled exceptions rather than boundary dumps. Include boundary and short-input test cases, not just the happy path, when unit testing interface parsing routines, and re-test offset logic whenever the dictionary length of an involved field changes.

This is an ABAP development issue, not a Basis issue. When the source data is an external interface or IDoc, functional or interface teams need to be looped in to confirm whether the short or malformed record is expected. The handover note should include the program, line number, the offset and length values at failure, and the specific input record or transaction that triggered it.

Sits alongside other runtime boundary checks such as table index overruns and unassigned field symbol errors, since all three stem from code addressing a position that does not exist in the target object. Frequently appears near string and structure parsing logic in custom reports, conversion programs, and interface mapping routines rather than in standard SAP code.