what is catch Command

[Former Member]

what is CATCH COMMAND WHERE we use this

[Former Member]

Hi,

catch command we will use for handling the exceptions.

see this link for more help

http://help.sap.com/saphelp_nw04/helpdata/en/a9/b8eef8fe9411d4b2ee0050dadfb92b/content.htm

<b>example:</b>

parameters NUMBER type I.

data RESULT type P decimals 2.

data OREF type ref to CX_ROOT.

data TEXT type STRING.

start-of-selection.

write: / 'Testing division and Sqare root with', NUMBER.

uline.

try.

if ABS( NUMBER ) > 100.

raise exception type CX_DEMO_ABS_TOO_LARGE.

endif.

try.

RESULT = 1 / NUMBER.

write: / 'Result of division:', RESULT.

RESULT = SQRT( NUMBER ).

write: / 'Result of square root:', RESULT.

catch CX_SY_ZERODIVIDE into OREF.

TEXT = OREF->GET_TEXT( ).

cleanup.

clear RESULT.

endtry.

catch CX_SY_ARITHMETIC_ERROR into OREF.

TEXT = OREF->GET_TEXT( ).

catch CX_ROOT into OREF.

TEXT = OREF->GET_TEXT( ).

endtry.

if not TEXT is initial.

write / TEXT.

endif.

write: / 'Final result:', RESULT.

rgds,

bharat.

[Former Member]

Hi

Catch commands are used to catch the errors.

Depending on whether your report has the flag "Unicode-enabled" set or not you will get a different result of the syntax check (SLIN) for statement

s_struc-t_table = itab1.

- Unicode-enabled = 'X': => syntax error if the structures do not match exactly

- Unicode-enabled = ' ': => perhaps no syntax error but system-exceptions due to type conversion errors possible

In the latter case you would use the following statement:

CATCH SYSTEM-EXCEPTIONS <type conversion error> = 1.

s_struc-t_table = itab1.

...

ENDCATCH.

However, please note that the CATCH SYSTEM-EXCEPTIONS is different from class-based exception handling because this statement does not return any error object.

Regards

Vasu