The Quartus® II software might generate this error when compiling a design that targets a Stratix® V device. This problem might occur if your design contains a memory megafunction generated with the parameter editor in the Quartus II software versions 12.0 SP1 and earlier. The error occurs if the memory has the
wr_addressstall port connected and is implemented using MLAB resources.
To work around this problem, either change the memory type to M20K or disable the
wr_addressstall port in the parameter editor.
This problem is fixed starting with the Quartus® II software version 14.0 where the
wr_addressstall port can be used with Stratix V MLAB memory blocks but only when the Read-During-Write option is set to Old memory contents appear.