CX_SY_RANGE_OUT_OF_BOUNDS dump in BSP F4 help

Hi ,

I am following a blog for creating a standard F4 help for MATNR in

my BSP application.

The standard search help has a custom elementary search help

for which the following dump is coming :

The following error text was processed in the system:

An exception with the type CX_SY_RANGE_OUT_OF_BOUNDS occurred, but was neither handled locally, nor declared in a RAISING clause

Exception Class CX_SY_RANGE_OUT_OF_BOUNDS

Error Name DATA_OFFSET_LENGTH_TOO_LARGE

Program ZCL_M_INPUT_HELP==============CP

Include ZCL_M_INPUT_HELP==============CM002

ABAP Class ZCL_M_INPUT_HELP

Method GET_HELPVALUES_BAPI

Line 221

Long text The sub area access (Offset = 248, Länge = &LEN GTH&) on a data object of size 255, lies outwith the valid boundaries.

I have the following code in my model class zcl_m_input_help in method

get_helpvalues_bapi where dump is coming:

****For each component (field) in the table -Output the data

LOOP AT struct ASSIGNING LEFT DELETING LEADING '0'.

ENDIF.

ENDLOOP.

ENDLOOP.

I would be really thankful if someone could help.