Resolving errors

If the simulator finds the cell instance but not the generic then an error message is issued. For example,

ERROR: myasic.sdf(18):
Instance '/testbench/dut/u1' does not have a generic named 'tpd_a_y'

In this case, make sure that the design is using the appropriate VITAL library cells. If it is, then there is probably a mismatch between the SDF and the VITAL cells. You need to find the cell instance and compare its generic names to those expected by the annotator. Look in the VHDL source files provided by the cell library vendor.

If none of the generic names look like VITAL timing generic names, then perhaps the VITAL library cells are not being used. If the generic names do look like VITAL timing generic names but don't match the names expected by the annotator, then there are several possibilities:

• The vendor's tools are not conforming to the VITAL specification.
• The SDF file was accidentally applied to the wrong instance. In this case, the simulator also issues other error messages indicating that cell instances in the SDF could not be located in the design.
• The vendor's library and SDF were developed for the older VITAL 2.2b specification. This version uses different name mapping rules. In this case, invoke vsim with the -vital2.2b option:

vsim -vital2.2b -sdfmax /testbench/u1=myasic.sdf testbench 

For more information on resolving errors see "Troubleshooting" .

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