For those that care (?) in the end I had to write my own handlers using some undocumented hooks in the ISC code and a LOT of trail and error, plus some custom operations/processes etc.  It was a painful process to get to work (but eventually did).

Hi All,

  Thanks for the replies, I certainly haven't explained the problem very well!, so short summary;

CSP page shows file browser (working) that takes a stream (working) sends the file to a Method (working) and then returns a new file into the same CSP page session (not working)

I appreciate this means the CSP will be "stuck" while the method creates the new file.  I have limited access to change any of this under the hood to send to a directory or use an integration engine or any other alternative.

   For Excel we use activate, as said the Excel and sending the file is not the problem.

    Regards

Hi Henrique,

  Not exactly, the excel isn't the problem, it's when I return the XLS to the browser I need the browser to interprut it as a attachment, the problem is the %response creation.