I am generating Excel file at run time and it also contains some data from work object. Now I need to attach this newly generated file to the work object. I have read the given article. Here they have directly opened the binary file rule and used 'pyFileSource' value in 'pyAttachStream'. So in article they have refer static file. In my case i am generating file at run time with some values from workobject so how can we get 'pyAttachStream' value for such files (which are generating at run time).