Cadence Liberate for characterizing

The most amazing is this error won't occur with the usage of UMC technology. This error occurs with the usage of TSMC technology models.

This article gives some info on how to debug this problem: Liberate prompts SYSTEM ERROR - could not execute command

If that doesn't help, please contact customer support.

Regards.

Andrew.

Thanks for your suggestion ! After I debug just as the solution, there is no errror accuring in the spectre output log file but some warning.

Warning from spectre during circuit read-in.
WARNING (SFE-1134): "/tmp/altos.VLSI-01.T20190522180417997308S0059505.0/sim.sp" 300: Unexpected value '1' - expected option name: skipped.

Warning from spectre during hierarchy flattening.
WARNING (SFE-30): "/tmp/altos.VLSI-01.T20190522180417997308S0059505.0/sim.sp" 300: .options: `brief' is not a valid parameter for an instance of `options'. Ignored.
WARNING (SFE-30): "/tmp/altos.VLSI-01.T20190522180417997308S0059505.0/sim.sp" 300: .options: `runlvl' is not a valid parameter for an instance of `options'. Ignored.

Could you give me more suggestions?

Thanks a lot !

Regards,

fengye

fengye said:

Could you give me more suggestions?

Hi fengye,

Yes, contact customer support as I suggested earlier. I'm out of the office this week (and I'm not a Liberate expert anyway), so my opportunity to investigate is rather limited. By contacting support, you'll get to somebody with the correct product expertise.

Andrew.

Hi Andrew,

Thanks for your suggestion, I will contact the customer support as you suggested.

Regards!

fengye

Hi, Andrew,

I'm happy to tell you that this error has been solved when I delete "define_leafcell -extsim_model -type nmos_soi -pin_position {0 1 2 3} { nfet lvtnfet }". There is no probelm with spectre. Thanks for your suggestions.

Could  you give some suggestions about the settiong of the constraint template for Dflipflop? Because I meet this type error

ERROR (LIB-304): (char_library): Constraint search for arc BALLOON_SIM, CK, r, NRESTORE, f, hold_rising fall_constraint (D * !SAVE) probe=Q failed. This cell is now marked as failed and should not be used. Modify your define_arc command and rerun.
ERROR (LIB-304): (char_library): Constraint search for arc BALLOON_SIM, CK, r, NRESTORE, f, hold_rising fall_constraint (!D * !SAVE) probe=Q failed. This cell is now marked as failed and should not be used. Modify your define_arc command and rerun.
ERROR (LIB-52): The constraint search failed to find a solution within the search range for arc of cell:'BALLOON_SIM', r_pin:'CK', r_pin dir:'r', pin:'NRESTORE', pin dir:'f', type:'setup_rising fall_constraint' when: (!D * !SAVE), GLITCH_PROBE. This cell will be marked as failed and the constraint data will be set to: 1.0 (see constraint_failed_value). To debug, review the saved simulation results for deck: setup_30. Possible causes include: 'constraint_glitch_peak' too small; 'constraint_check_final_state_threshold' too large; estimated search range too small (see constraint_search_bound). Modify the constraint parameters and rerun.
ERROR (LIB-55): No valid vectors were found for the user provided define_arc for arc of cell:'BALLOON_SIM', r_pin:'CK', r_pin dir:'r', pin:'NRESTORE', pin dir:'f', type:'hold_rising fall_constraint' when: (D * !SAVE). To debug, review the saved simulation results for deck: hold_36. Review port direction and vector values. Review spice deck(s) for valid delay measurements.
ERROR (LIB-55): No valid vectors were found for the user provided define_arc for arc of cell:'BALLOON_SIM', r_pin:'CK', r_pin dir:'r', pin:'NRESTORE', pin dir:'f', type:'hold_rising fall_constraint' when: (!D * !SAVE). To debug, review the saved simulation results for deck: hold_40. Review port direction and vector values. Review spice deck(s) for valid delay measurements.

In my template tcl, for VDD=1.1V, my setting is 

define_template -type constraint \
-index_1 {0.00240103 0.170448 0.760328 } \
-index_2 {0.00240103 0.0861582 0.380164 } \
constraint_template_3x3

I hope your reply when your're in your free time.

Regards,

fengye

Fengye,

As I said earlier, I am not a Liberate expert. I know enough to understand the principles, but not enough to answer such questions without it involving a lot of experimentation and research. I would normally defer such questions to Guangjun in my team (who often answers here for Liberate questions) but he is away for at least another week.

As I suggested before, your best option would be to ask this kind of detailed question to customer support.

Regards,

Andrew.

Hi Andrew,

I know what you mean, thanks a lot.

Regards,

fengye