Answers Database

QuickSim: Unable to resolve expression symbol lca_technology, NULL modelwill be inserted


Record #141

Product Family:  Software

Product Line:  Mentor

Problem Title:
QuickSim: Unable to resolve expression symbol lca_technology, NULL
modelwill be inserted



Problem Description:
Keywords: QuickSim, lca_technology, NULL model

Urgency: Standard

General Description:

In Mentor 8, an error similar to the following may appear when invoking
Quicksim:

//  Error: Unable to resolve expression symbol lca_technology (from:
DDMS/EDDM/EDDM General 41)
//  Error: Instance: '/BLANK1'
//	  Trouble accessing MODEL property on primitive instance.
//	  May be bad property evaluation. NULL model will be inserted.
(from: Analysis/Digital Simulation Utilities/Dsim 16)
//  Error: Unable to resolve expression symbol lca_technology (from:
DDMS/EDDM/EDDM General 41)
//  Error: Instance: '/BLANK2'
//	  Trouble accessing MODEL property on primitive instance.
//	  May be bad property evaluation. NULL model will be inserted.
(from: Analysis/Digital Simulation Utilities/Dsim 16)
//  Error: Unable to resolve expression symbol lca_technology (from:
DDMS/EDDM/EDDM General 41)
//  Error: Instance: '/BLANK3/UNKNOWN1'
//	  Trouble accessing MODEL property on primitive instance.
//	  May be bad property evaluation. NULL model will be inserted.
(from: Analysis/Digital Simulation Utilities/Dsim 16)


Solution 1:

For XACT 5.x users:

This is caused by a non-existent or incorrectly written simulation
viewpoint for the design.  The solution is to run PLD_DVE_Sim on the
design, specifying the correct part family, from either PLD Design Manager
or the command line.  An XC4000 design, for example, would use:

   pld_dve_sim blanking_design xc4000

If a default viewpoint already exists, you will need to FIRST delete that
viewpoint before you can run PLD_DVE_Sim.  See (Xilinx Solution 766).

Note: If Timsim8 -o was used to create the simulation model, be sure to run
Timsim8 instead of PLD_DVE_Sim.  This is because Timsim8 -o links timing
information into the viewpoint after it runs PLD_DVE_Sim.



Solution 2:

For XACT M1 users:

This is caused by a non-existent or incorrectly written simulation
viewpoint for the design.  The solution is to run PLD_DVE -S on the
design, specifying the correct part family, from either PLD Design Manager
or the command line.  An XC4000E design, for example, would use:

   pld_dve -s blanking_design xc4000e default

Since PLD_DVE in M1 annotates pre-existing viewpoints, there is no need
to first delete a pre-existing viewpoint.



End of Record #141