Answers Database
dc2ncf: ERROR [#154]: Invalid argument -max for set_input_delay constraint at line x
Record #3139
Product Family: Software
Product Line: FPGA Implementation
Product Part: dc2ncf
Product Version: 1.3.
Problem Title:
dc2ncf: ERROR [#154]: Invalid argument -max for set_input_delay constraint at line x
Problem Description:
Urgency: Standard
General Description: When usind dc2ncf, this error is
generated:
ERROR [#154]: Invalid argument -max for set_input_delay constraint at line x
Dc2ncf will generate a ncf file that does not contain the
timing contraint specified at line x.
Solution 1:
Dc2nf does not support the -max argument specified by Synposys
timing constraints. Simply remove the -max argument from the
timing constraints and run dc2ncf again.
This problem only exists in M1.3. In M1.4. Dc2ncf will ignore
the -max argument but write out the ncf file with the timing constraint specified at line x. The -m
ax option for set_input_delay/set_output_delay
is not supported in M1.3 and M1.4. Currently, Xilinx only supports
worst-case delays.
For more information about Synopsys timing constraints that are
supported by dc2ncf, please refer to Section: Creating Timing
Constraints, Chapter: 3, of the Synopsys XSI Interface/Tutorial
Guide.
End of Record #3139 - Last Modified: 11/26/97 16:48 |
