Answers Database
Constraints Editor 2.1i: TNM_NET is written twice in UCF
Record #6848
Product Family: Software
Product Line: M1 Implementation
Product Part: Constraints Editor
Product Version: 2.1i
Problem Title:
Constraints Editor 2.1i: TNM_NET is written twice in UCF
Problem Description:
Urgency: Standard
General Description:
With the following single PERIOD constraint in the ucf file:
NET "clk100m" PERIOD = 10ns;
Without making any edits, do a "File->Save As" and save the
UCF to a new ucf. The resulting UCF file has two TNM_NET
declarations:
NET "clk100m" TNM_NET = "clk100m";
NET "clk100m" TNM_NET = "clk100m";
NET "clk100m" PERIOD = 10 ns;
This causes NGDBUILD to error out
ERROR:NgdHelpers:702 - The TNM "clk100m" drives the
CLKIN pin of CLKDLL "CLKDLL_u1". This TNM cannot
be traced through the CLKDLL because it is not used in
exactly one PERIOD specification. This TNM is used in
the following user groups and/or specifications: <none>
Solution 1:
Modify the UCF file manually.
This will be fixed in a future release of the software
End of Record #6848 - Last Modified: 09/23/99 12:45 |
