"ERROR:NgdBuild:393 - Could not find INST(S) '<instance_name>' in design '<design_name>'.
ERROR:NgdBuild:134 - Unable to process the "<design_name>.ncf" constraints file; please see the above messages for details. Check to make sure the file exists and that you have read permission for it. If this is the case, check the syntax of the file using the "Attributes, Constraints, and Carry Logic" section of the Libraries Guide as a reference.
ERROR:NgdBuild:276 - edif2ngd exited with errors (return code 1).
ERROR:NgdBuild:28 - Top-level input design file "<design_name>.edn" cannot be found or created. Please make sure the source file exists and is of a recognized netlist format (e.g., NGO, EDIF or XNF)."