Thanks Vadim and Ashish
Actually I was trying to copy report by left click on any cell of report>>> EPM>>>COPY REPORT which I used to do on SP12 earlier ....And in SP 12 it used to work fine..It seems that on SP19 this way is not working.
Now I tried to copy report from REPORT ACTION >>> COPY REPORT from EPM ribbon as suggested by Vadim and got an error "Logon ticket creation has been disabled". I have got the link for the solution at "Logon Ticket Creation has been Disabled" Error message - BPC 10 NW. working on it.
Thanks for replies guys
VSM