Fix fir #1172

Public/Import-Excel.ps1

@@ -226,6 +226,8 @@
             }
             catch { throw "Failed importing the Excel workbook '$Path' with worksheet '$WorksheetName': $_"; return }
             finally {
+                $EndRow = 0
+                $EndColumn = 0
                 if ($Path) { $stream.close(); $ExcelPackage.Dispose() }
             }
         }