I have downloaded sles for sap 15 sp1 ,when i try to boot it vmware virtual machine it says ,no boot media found,what could be problem
@rajiv Hi and Welcome to the Forum 
You should have probably posted over here https://forums.suse.com/categories/sles-install-boot since this forum is for the Desktop 
Hit the ‘Flag’ button and ask for it to be moved.
Anyway, Was it the server for ‘Applications’ or the ‘All-in-one’ are you booting from just the mounted iso image, or USB device etc?