sdc and altsyncram

There is definitely a way to show/constrain you memory output.

1. Identify the output of your memory via Timequest Name Finder.

This is done by View -> Name Finder: Filter the search results the respective instances to your memory output (wildcards are allowed and should be used).

2. Select your memory output in the Name Finder and click the right arrow. Now you can copy the text in the Name Finder's bottom line with <ctrl>-<c>.

3. Click Custom Reports -> Report Timing. Paste the clipboard in the Targets "from" field. Apply "*" in the "To"-field. Increase the value in "Report number of paths" to be sure to get all (relevant) paths.

This will show the paths fan out by the memory output. for the incoming paths flip the entries of the "From" and "To"-field.

4. Now you can see in the waveform tab, if your multicycle assigment was properly taken into account.

5. Repeat the procedure for the other signals you interested in (read_ena, write_ena).

NB: if you write a multicycle assignment for a (set of) path(s) make sure that this paths exist.