Hi, Romesh - 

Incompletely qualified and nested method call such as these can be unclear and difficult to troubleshoot / debug. What DataWindow control (DWC) are the GetItemString, GetItemDatetime and GetRow methods being invoked against?

I suggest you first try including the DWC name with all methods to see if that helps. If it does not, put all methods in their own assignment statements to variables so that you can inspect the results using the debugger and verify you are getting the values you expect.

Regards, John

1) make sure you don't have any spaces in the quoted field name. 

that is SOOOO easy to do if you copy and paste names.  the display in the PB ide often make it impossible to see extra spaces, especially if you change your font.

" invoice" vs "invoice"

2) you are using:

getitemdatetime(getrow(),"invoice_date"))

this code would have to be in a function/event that is a datawindow that has a field name of "invoice_date" and that also has a row in it.  if that is not the case, you would get that error.

Hi Romesh;

  FWIW: I would use a GetRow() command before the SetItemXxxxx() that fails to make sure that you have a current (valid) row number set in the DWO. Otherwise, the SetItemXxxx() would fail.  HTH

Regards ... Chris