AR# 141: QuickSim: Unable to resolve expression symbol lca_technology, NULL model will be inserted
AR# 141
QuickSim: Unable to resolve expression symbol lca_technology, NULL model will be inserted
説明
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)
ソリューション
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.
2
For Xilinx M1 or later 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.