Extended syntax check, currency error?

Hi,

I'am getting this error:

Use addition CURRENCY when outputting WA_BILLIT_DOWN-ERDZ_NETTOBTR

Use auxiliary field when outputting with MESSAGE

This is the code:

    WRITE wa_billit_down-erdz_nettobtr TO lv_nettobtr_char
    LEFT-JUSTIFIED .

I am using WRITE TO, so can I ignore this error??

Adibo..:)