negative value for currency field in table control

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hi all,

can one of you resolve this issue for me.

i have a table control on a screen which has one field as a currency field (afrv-hrbet).

i also have a separate I/O field on the screen of the same type as the table control currency field.

i am supplying values to both of these from the program (module pool). the trouble comes when i try to supply negative values....the I/O field accepts and displays the negative value but the table control field does not do so and execution ends up giving a dump for a conversion failure.

plz let me know why this is happening.

here is a test code extract in the module pool

DATA : BEGIN OF itab OCCURS 0,

fld1(10),

fld2(10),

fld3(10),

fld4 TYPE afrv-hrbet,

sel TYPE c,

END OF itab.

afrv-hrbet = '-100'.

*this is the I/O field that refers to dict definition,

*the table control field (itab-fld4) does not..it picks *up its type from the program....is this the issue?????

itab-fld1 = 'abc'.

itab-fld2 = 'abc'.

itab-fld3 = '100'.

itab-fld4 = '100'.

APPEND itab.

itab-fld1 = 'pqr'.

itab-fld2 = 'pqr'.

itab-fld3 = '200'.

itab-fld4 = '200'.

APPEND itab.

************************the above code runs fine but the following gives a dump

itab-fld1 = 'abc'.

itab-fld2 = 'abc'.

itab-fld3 = '100'.

itab-fld4 = '-100'.

APPEND itab.

itab-fld1 = 'pqr'.

itab-fld2 = 'pqr'.

itab-fld3 = '200'.

itab-fld4 = '-200'.

APPEND itab.

regards,

PJ