>I made a Form in wick i use a relation to another table
>I used a combo box, the result of the click of the mouse
>in the combo box goes to a register in other table but when i push the new record botton an error occurs:
>APPEND BLANK
>violation in the register
>why tha error?

If you have a candidate or Primary (unique) Index then you may already have a blank field in that index. This is not allowed. Look for a blank field in your indexed field. You can also put trapping in to make sure this does not occur the first time.

HTH,
Tom