使用Apache POI写入excel。 FileNotFoundException :(无法对打开了用户映射部分的文件执行请求的操作）

Can anyone help shine any light into this? I am trying to write an array of data to excel to the next empty line from a selenium test script. My code works for generating the excel the first execution, writes the data properly, but then on second execution (in the same application run), and follow-up executions throws the following:Can anyone help shine any light into this? I am