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An error occurs when trying to exit from ALV report

Hi,

I have a report which imports and display in ALV data from an excel file. Unfortunately when I'm trying to exit I receive an error as I copied below.

Runtime Errors MOVE_TO_LIT_NOTALLOWED_NODATA

Date and Time 17.10.2008 08:39:18

Short text

Error at assignment: Overwritten protected field.

What happened?

Error in the ABAP Application Program

The current ABAP program "SAPLSLVC_FULLSCREEN" had to be terminated because it

has

come across a statement that unfortunately cannot be executed.

Error analysis

A new value is to be assigned to the field "<L_BOX>", although this field is

entirely or partly protected against changes.

The following are protected against changes:

- Character literals or numeric literals

- Constants (CONSTANTS)

- Parameters of the category IMPORTING REFERENCE for functions and

methods

- Untyped field symbols not yet assigned a field using ASSIGN

- TABLES parameters if the actual parameter is protected against changes

- USING reference parameters and CHANGING parameters for FORMs, if the

actual parameter is protected against changes and

- Accesses using field symbols if the field assigned using ASSIGN is

protected (or partially protected, e.g. key components of an internal

table with the type SORTED or HASHED TABLE) against changes

- Accesses using references, if the field bound to the reference is

protected (or partially protected) against changes

- External write accesses to READ-ONLY attributes,

- Content of a shared object area instance accessed using a shared lock

(ATTACH_FOR_READ).

Trigger Location of Runtime Error

Program SAPLSLVC_FULLSCREEN

Include LSLVC_FULLSCREENF02

Row 686

Module type (FORM)

Module Name MARKS_SAVE

How can I solve the problem ?

Thanks

Stefan

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