Copy And Paste / Sheets Merging - When Only 1 Row Of Data

I want to copy data from workbook1-sheet1 to workbook2-sheet2. I done the coding and it was working fine till when the data to copy from and copy to is only 1 row.

Code:
Sub sheets_merger()

location_path_file1 = Range("location_path_file1")
location_path_file2 = Range("location_path_file2")
file1 = Range("file1")
file2 = Range("file2")

[Code] .......

Below is the exact error message:

HTML Code:
Run-time error '1004':

The information cannot be pasted because the Copy area and the paste area are not the same size and shape. Try one of the following:

* Click a single cell, and then paste.
* Select a rectangle that's the same size and shape, and then paste.
I believed when there's only 1 row of data, the code copy the entire sheet1 and can't locate the last empty row in sheet2.

Should I use a if to check for > 1 row of data (2 rows including header row) or is there a better way?