Determine ROW that caused “unexpected end of file” error in BULK INSERT?

To locate the troublesome row use the errorfile specifier.

BULK INSERT myData
FROM 'C:\...\...\myData.csv'
WITH (
FIELDTERMINATOR = ',',
ROWTERMINATOR = '\n',
ERRORFILE = 'C:\...\...\myRubbishData.log' 
);

myRubbishData.log will have the offending rows and a companion file myRubbishData.log.txt will give you row numbers and offsets into the file.

Companion file example:

Row 3 File Offset 152 ErrorFile Offset 0 - HRESULT 0x80004005
Row 5 File Offset 268 ErrorFile Offset 60 - HRESULT 0x80004005
Row 7 File Offset 384 ErrorFile Offset 120 - HRESULT 0x80004005
Row 10 File Offset 600 ErrorFile Offset 180 - HRESULT 0x80004005
Row 12 File Offset 827 ErrorFile Offset 301 - HRESULT 0x80004005
Row 13 File Offset 942 ErrorFile Offset 416 - HRESULT 0x80004005