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Description

This error indicates that an evaluation sample size, required for a specific analysis or report, has been set to a value less than zero. It typically occurs when the system expects a non-negative number to proceed with calculations or data processing.

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Error Message

Evaluation sample size has to be not less than zero

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Known Causes

3 known causes

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Negative Manual Input

A user manually entered a negative number into a field designated for the evaluation sample size.

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System Configuration Error

An underlying system configuration or calculated parameter resulted in a negative value for the evaluation sample size.

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Invalid Data Import

Data imported from an external source contained an invalid negative value for the sample size field, leading to this error.

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Solutions

3 solutions available

1. Verify and Correct Evaluation Sample Size in SAP Configuration easy

Directly adjust the evaluation sample size setting within SAP S/4HANA's configuration to a valid non-negative value.

1

Access the SAP S/4HANA system using a user with sufficient authorization to modify system configurations. Navigate to the relevant transaction code for managing system parameters or evaluation settings. This might vary depending on the specific module or functionality triggering the error, but common areas include system administration or performance tuning transactions.

2

Locate the parameter or setting that controls the 'Evaluation Sample Size'. This could be named something like 'SAMPLE_SIZE', 'EVAL_SAMPLE', or similar. The exact location will depend on the specific SAP component or report generating error 5191.

3

Review the current value. If it is negative, update it to a non-negative integer. A value of '0' is generally acceptable, indicating no sampling or full evaluation. For performance-related evaluations, a small positive integer (e.g., 10, 100) is often used. Consult SAP documentation or your functional consultant for recommended values for your specific scenario.

4

Save the changes. After saving, restart the relevant SAP S/4HANA services or the application component that was experiencing the error to ensure the new configuration takes effect. Test the functionality that previously caused the error.

2. Review and Debug Custom Code or Reports medium

Investigate custom ABAP programs or reports that might be incorrectly setting the evaluation sample size.

1

Identify the specific custom ABAP program, report, or enhancement that is triggering SAP S/4HANA Error 5191. This can often be determined by the transaction code being used, the user's activity, or through SAP's ST05 (Performance Trace) or SAT (ABAP Runtime Analysis) tools.

2

Analyze the ABAP code responsible for setting the evaluation sample size. Look for variables or function modules that are assigned a value to this parameter. Pay close attention to any logic that might inadvertently result in a negative value being assigned (e.g., calculations, date differences, or default values).

DATA lv_sample_size TYPE i.

" ... potential calculation or logic ...
IF sy-subrc <> 0.
  lv_sample_size = -1.  " Example of incorrect assignment
ELSE.
  lv_sample_size = 100.
ENDIF.

" Call to a function module or BAPI that uses this parameter
CALL FUNCTION 'SOME_EVALUATION_FUNCTION'
  EXPORTING
    sample_size = lv_sample_size
  IMPORTING
    ...
  EXCEPTIONS
    invalid_sample_size = 1
    OTHERS = 2.

3

Implement corrective logic to ensure the sample size is always a non-negative integer. This might involve using 'MAX(0, calculated_value)' or adding explicit checks before assigning the value. If the sample size is derived from user input, add validation to prevent negative entries.

DATA lv_calculated_size TYPE i.
DATA lv_final_sample_size TYPE i.

" ... calculation of lv_calculated_size ...

IF lv_calculated_size < 0.
  lv_final_sample_size = 0.
ELSE.
  lv_final_sample_size = lv_calculated_size.
ENDIF.

" Or more concisely:
lv_final_sample_size = MAX( 0, lv_calculated_size ).

CALL FUNCTION 'SOME_EVALUATION_FUNCTION'
  EXPORTING
    sample_size = lv_final_sample_size
  IMPORTING
    ...
  EXCEPTIONS
    invalid_sample_size = 1
    OTHERS = 2.

4

Test the modified code thoroughly in a development or quality assurance environment before deploying it to production. Ensure that the error no longer occurs and that the functionality operates as expected with valid sample sizes.

3. Check SAP Notes and System Updates easy

Determine if this is a known issue addressed by SAP Notes or if a system update is required.

1

Log in to the SAP Support Portal (SAP ONE Support Launchpad).

2

Navigate to the 'SAP Notes' section and search for 'Error 5191' or 'Invalid Evaluation Sample Size' in conjunction with 'SAP S/4HANA'. You can also include specific component names if you have an idea which module is affected.

3

Review the search results for relevant SAP Notes. If a note addresses this specific error, read its description carefully to understand the cause and the recommended solution. This might involve applying a correction program, updating a specific component, or changing a system setting.

4

If a relevant SAP Note is found, follow its instructions precisely. This may involve downloading and implementing correction programs (SNOTE transaction) or performing manual configuration changes as described in the note. Ensure your SAP S/4HANA system is up-to-date with the latest support packages and kernel patches, as this error might be resolved in a newer release.

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Related Errors

5 related errors

SAP S/4HANA Error 5191: Invalid Evaluation Sample Size