Re: How do I merge ELF and BIT into a configuration file with ZynqUltrascale+?
Associating the ELF files is used to place an ELF into a Microblaze Application memory (LMB bram, or AXI bram). So, this is why you get the error here.
If you are targgeting the SRM processor on the PSU and want to add the ELF, then you will need to add this ELF to the boot partition. The FSBL (First Stage Bootloader_ will be executed, this will load all the images in the boot partition (user can create this in SDK), and will handoff execution (in your case to your elf)