ABAP Keyword Documentation → ABAP - Reference → User Dialogs → Screens → Statements in the Screen Flow Logic → FIELD
Handling of messages at event PAI
If the statement FIELD in the event block on
PAI is
linked with a MODULE statement, then the statement controls the handling of
warnings and
error messages, which
are send in the called module using the statement MESSAGE.
Other versions: 7.31 | 7.40 | 7.54
Handling outside a processing chain
If FIELD is listed outside a processing chain that is introduced with
CHAIN, and if a warning or an error message is sent in the dialog module
specified after MODULE, then the PAI processing is interrupted and the
screen is displayed again without triggering the event
PBO. The input field belonging
to dynp_field is the only field ready for input on the current screen and
can be overwritten by the user . If the value in the input field is changed by the user, the PAI processing
is continued after an user action with the first FIELD- or CHAIN-statement that is linked with the
dynpro field dynp_field.
If the value in the input field is not changed by the user, then the PAI processing is continued again
with the current FIELD statement. Previous statements of the PAI event block are not processed again.
Handling within a processing chain
If FIELD is listed within a processing chain, introduced by
CHAIN, and if a warning or an error message was sent within a module
that was called within the processing chain, then the PAI processing is interrupted and the screen displayed
again without triggering the event PBO. All input fields of the dynpro fields are ready for input, which
are listed within the processing chain after FIELD statements. If the value
of at least on of these input fields is changed by the user , then the PAI processing continues after
an user action at the first FIELD or CHAIN statement
that is linked with one of changed dynpro fields. If none of the input fields is changed by the user,
the PAI processing continues again directly at the CHAIN statement of the current processing chain. Previous statements of the PAI event block are not processed again.
Note
- If an error message occurs at user input, then the user must correct the input values until no error
message is sent, whereas after a warning, the input values can be confirmed unchanged. The warning is
not sent again at the second execution of the
MESSAGEstatement.
- If warnings or error messages are sent in modules without reference to
FIELDorCHAIN, then the PAI processing is interrupted and the screen is displayed again without triggering the event PBO and without a field on the screen being ready for input . In the event of an error message, the user must terminate the processing. In order to do this, an according option must be created on the user interface, otherwise the program can only be terminated from outside.
- User actions linked to function codes that set the
OK field also count as changes
to input fields. A prerequisite for this is that the OK field is defined in the screen and that function codes are not read exclusively by the system field
sy-ucomm.