Read matrix from excel-file

I have also tried as below. But I still don't get it to work. What do I miss? Some syntax error?

matrix (4000, 4000) mat1

mat1.read (d3, s=Yield) "G:\EkAn\_Gemensam\Rapporter\Bankernas räntor och utlåning\Finansieringskostnad\Modell\Interpolering säkerställda\Räntor säkerställda storbankerna 2015-07-09.xls"

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