Hi, I have an excel which is fed with equations on sheet2. from my fortran program, I want to write output on sheet1 of this excel - is this possible. I know how to write the output to excel, unfortunately, it deletes the existing excel and makes a fresh copy in the folder - where by I loose the excel with equations/macros on the sheet2. I want the equations/macros on sheet2 to work on the extracted values on sheet1...appreciate your suggestion on how to write into the same excel file.thanks