Answers Database

PLD_DA Check: Unable to evaluate property, unable to resolve lca_technology


Record #155

Product Family:  Software

Product Line:  Mentor

Problem Title:
PLD_DA Check: Unable to evaluate property, unable to resolve
lca_technology



Problem Description:
When running the Check function on a Mentor schematic, you may get the
following warnings:

   Warning:  Unable to evaluate property "model" on MIDORI
	     Unable to resolve expression symbol lca_technology
   Warning:  Unable to evaluate property "__qp_prim" on MIDORI
	     Bad Triplet CASE Control Expression
	     Unable to resolve expression symbol lca_technology


Solution 1:

All Xilinx simulation models in Mentor have a variable associated with them
called "lca_technology".  Normally, this parameter is set whenever a library
component is instantiated, but a number of situations can make the parameter
get lost.  If lca_technology is missing when Check is run, Check will not be
able to evaluate any properties that use this parameter.

In any case, the lca_technology parameter does not need to be set until the
design is simulated or translated to XNF.  When one of these happens, the
tools generate the appropriate viewpoints, which fill in the lca_technology
parameter with the proper value.  Therefore, these warnings can be safely
ignored.

To recover the value of lca_technology and unclutter the Check report of the
warnings, select:

   Check -> Parameters -> Set

In the dialog box, enter lca_technology as the parameter name, and set the
value to the appropriate family (e.g., xc3000 or xc4000).  After doing this,
re-execute Check Sheet.



End of Record #155