I am attempting to paste some data into the first non-blank row below
a matrix of data. I'm using the following coding to do this (which I
have used before):

Sheets("Master").Select
Range("A1").Select
Selection.End(xlDown).Offset(1, 0).Select
ActiveSheet.Paste

Now, I keep getting a run time error on the selection line. What am I
doing wrong?

Thanks.