Did you follow these instructions from the top of the Write ID Block program? Based on your errors, it looks like you might be missing them.
To program an RCM67xx board which lacks an existing correct and valid system
ID block, add the appropriate set of the following sets of macro=value lines
to Dynamic C's Project Options' Defines tab. If Dynamic C stops the compile
because of too many invalid macro redefinition warnings, increase the
"Max Shown > Warnings:" count to 100 on the Project Options' Compiler tab.
If you select the RCM6700 in "Targetless" tab of "Project Options", can you compile the program to a binary file ("Compile/Compile to .bin file" menu option)? Make sure you can get that to work first.
You might need to enable "Separate Instruction & Data" in the Compiler Options if you continue to have xmem code space errors.