>Even though txtbox_date is defined as a textbox which requires user input as a date. When this line below excutes vfp says txtbox_date not found
>
>EMPTY(Alltrim(txtBox_date.value))

You have to fully qualify an object. Also, you don't need ALLTRIM() inside EMPTY()

IF EMPTY(Thisform.txtBox_date.value) OR Empty(Thisform.ccombobox1.Value) 
...