I have dumped memory location from say memory location 0x10000 to 0x20000 in a process to a file. I have a crash dump of the same process and now on windbg I want to write this memory to the specified location so that I can use this data while debugging.
I had thought that I would be able to do it via .readmem(https://learn.microsoft.com/en-us/windows-hardware/drivers/debuggercmds/-readmem–read-memory-from-file-) but it does not work.
The command I use is

.readmem C:pathtofilecontainingmemory 0x10000 0x20000

The file gets read but get an error

Unable to write memory at 0x10000, load is incomplete

How can I resolve this ?