General Description: The Foundation symbol generated for the Virtex Dynamic Constant Coefficient and Variable Parallel Multipliers ALWAYS contains the optional pins (typically CE, ACLR, ASET, SCLR and/or SSET) regardless of whether or not they have been requested by the user. Because the pins were not requested, the underlying EDIF implementation netlist for the core will not contain these pins. This mismatch between symbol and netlist results in "unexpanded block" errors in NGDBUILD when the design containing the core is processed.
The Foundation symbol for a CORE Generator core is generated by a Foundation- specific executable called NET2SYM, which takes an XSF file (an XNF file containing only the module's ports) as input.