General Description: When I implement a design in Foundation 3.1i with Service Pack 8 or Design Manager 3.1i with Service Pack 8, the following error message is reported during the "translate" stage:
"ERROR:NgdBuild:408 - Invalid UCF/NCF property value detected, line number is 40, offset is 10, value is '='"
ソリューション
When this error is reported, check the .ncf file. FPGA Express has incorrectly entered a constraint into this file, which will read something similar to:
NET "U1/"="-return243" TNM_NET = "U1_"="-return243" ;
Note that the constraint contains the invalid "=" in the middle of the net name and the timing net name.
To avoid this problem, change these names to reflect the actual names: