General Description: When I run NGDBuild on an EDIF netlist produced from Synplify, the following error appears:
"ERROR:NgdBuild:432 - logical block '<instance>' with type 'DFFRS' is unexpanded."
"ERROR:NgdBuild:432 - logical block '<instance>' with type 'LDCP_1' is unexpanded."
This occurs on XC4000/X/XL/XLA and Spartan/XL devices.
This problem is fixed in Synplify version 7.0.
The DFFRS and LDCP_1 primitives are not supported in XC4000/X/XL/XLA or Spartan/XL devices. However, Synplify incorrectly instantiates these primitives when it recognizes the construct in the HDL code.
To work around this, copy "dffrs.xnf" and "ldcp_1.xnf" from the following directory:
to the directory where the top-level EDIF project file resides.
(NOTE: $SYNPLICITY is the directory of Synplify software install.)