TXW_EXTRACT_CHECKSUM_VERIFY SAP Function module - Verify extract byte-level checksum

TXW_EXTRACT_CHECKSUM_VERIFY is a standard SAP function module available within R/3 SAP systems depending on your version and release level. Below is the pattern details for this FM showing its interface including any import and export parameters, exceptions etc as well as any documentation contributions (Comments) specific to the object.

See here to view full function module documentation and code listing, simply by entering the name TXW_EXTRACT_CHECKSUM_VERIFY into the relevant SAP transaction such as SE37 or SE80.

Associated Function Group: TXW2
Released Date: Not Released
Processing type: Normal fucntion module

Pattern for FM TXW_EXTRACT_CHECKSUM_VERIFY - TXW EXTRACT CHECKSUM VERIFY

CALL FUNCTION 'TXW_EXTRACT_CHECKSUM_VERIFY' "Verify extract byte-level checksum
  IMPORTING
    byte_check_sum =            " i
    ref_check_sum =             " i
  EXCEPTIONS
    NO_CHECKSUM_AVAILABLE = 1   "               No checksum available
    CHECKSUM_INVALID = 2        "               Checksum is invalid
    .  "  TXW_EXTRACT_CHECKSUM_VERIFY

ABAP code example for Function Module TXW_EXTRACT_CHECKSUM_VERIFY

The ABAP code below is a full code listing to execute function module TXW_EXTRACT_CHECKSUM_VERIFY including all data declarations. The code uses the latest in-line data DECLARATION SYNTAX but I have included an ABAP code snippet at the end to show how declarations would look using the original method of declaring data variables up front. This will allow you to compare and fully understand the new inline method. Please note some of the newer syntax such as the @DATA is not available until a later 4.70 service pack (SP8).

DATA:
ld_byte_check_sum  
 
 TYPE I
,
ld_ref_check_sum  
 
 TYPE I
.

.

CALL FUNCTION 'TXW_EXTRACT_CHECKSUM_VERIFY'
  IMPORTING
    byte_check_sum =             ld_byte_check_sum
    ref_check_sum =              ld_ref_check_sum
  EXCEPTIONS
    NO_CHECKSUM_AVAILABLE =      1
    CHECKSUM_INVALID =           2
    .  "  TXW_EXTRACT_CHECKSUM_VERIFY

IF SY-SUBRC EQ 0.
  "All OK
ELSEIF SY-SUBRC EQ 1. "Exception
  "Add code for exception here
ELSEIF SY-SUBRC EQ 2. "Exception
  "Add code for exception here
ENDIF.

ABAP code to compare 7.40 inline data declaration with original syntax

The below ABAP code uses the older none in-line data declarations. This allows you to see the coding differences/benefits of the later inline syntax. It may also be useful if you are using an older version of SAP as some of the newer syntax above, such as the @DATA is not available until 4.70 EHP 8.

DATA:

ld_byte_check_sum
 
 TYPE I ,
ld_ref_check_sum
 
 TYPE I .