getting unable to resolve class Workbook error

Hi ,

I am getting below error while running groovy script in soap ui 5.3.0.

unable to resolve class Workbook @ line 13, column 10. Workbook workbook1 = Workbook.getWorkbook(new File("C:\\file path\\testdata_reverse material.ods"))

using the groovy script i am trying to fetch data from external xl sheet saved in my local and basically trying to perform data parameterization through xlsheet.

Thanks,

Suchismita