Is there a Matlab model of the AD9957 component (with filter taps and bit rounding operations in each stage) ?
The link provided in a previous answer on this subject is no longer valid.
The Matlab source code for the "simulation tool" included with some versions of the AD9957 installation software is not available for distribution.
Because you did not provide details for which link was no longer valid, I am not able to confirm the validity of the link.
Is this, by chance, the EngineerZone thread you were referring to? I was able to access the links in the thread, so it should work for you, too.