PSpice - Recent Threads

Associate psice model greyed out

Shashank — Tue, 21 Jul 2026 16:35:43 GMT

OrCAD X Capture 24.1.
Created Project A without selecting Enable PSpice Simulation.
Created Project B with Enable PSpice Simulation selected.
Placed the same SamacSys Library Loader component in both projects.
In Project A, Associate PSpice Model is grayed out.
In Project B, Associate PSpice Model is enabled.
Since Simulation Profile can still be created in both Projects , I am unsure why only Associate PSpice Model is disabled.
Is this expected behavior in OrCAD X Capture 24.1?
Is there a supported way to enable Associate PSpice Model in an existing project created without Enable PSpice Simulation, or is creating a new PSpice-enabled project required?
Is there any project setting that controls the availability of Associate PSpice Model?

RE: Associate psice model greyed out

IshaS — Fri, 30 Oct 2026 13:42:27 GMT

Hi Shashank,

Are those PSpice components?

RE: Electrothermal model in MbreakN or other mosfet models?

IshaS — Fri, 30 Oct 2026 13:40:45 GMT

Hi US202607259240,

Which MOSFET parameters do you specifically need to vary with junction temperature, for example RDS(on), threshold voltage, mobility/transconductance, leakage, or capacitances?
Could you share the PSpice version you are using?

Electrothermal model in MbreakN or other mosfet models?

US202607259240 — Wed, 21 Oct 2026 08:05:07 GMT

Hello, I am trying to simulate electrothermal model in MOSFET for MbreakN model found in Pspice, however, I couldn't find a way to connect this component with a self built RC cauer model. I came to an understanding that the dynamic temperature cannot be passed as argument in MbreakN. Is there any way to do this, or any model which already has existing integrated electrothermal coupling where other parameters could be varied arbitarily? I have found some specific industrial models designed for their own products but I want to know if it is possible in some arbitary models. So far I have used ABM to model a simple MOS equation with cauer model connected to it, but this could increase the difficulty when a compact MOSFET model is required.

Thank you.

PSpice for TI installer fails: HTTP 403 Forbidden downloading TI_URLs.txt

ZS202610299347 — Thu, 29 Oct 2026 15:44:09 GMT

Hello Cadence Support,

I am unable to install PSpice for TI because the installer cannot download its configuration file.

Installer message:
"Unable to access the URL required for installation"

Failing URL:
pcb.cadence.com/.../TI_URLs.txt

The same URL returns HTTP 403 Forbidden when accessed directly outside the installer.

Observed response details:
- Server: CloudFront
- X-Cache: Error from cloudfront
- HTTP status: 403 Forbidden

The installer’s network check reports that Internet connectivity and TLS 1.2 are available, and that proxy credentials are not required. The problem has been reproduced repeatedly.

Could you please confirm whether access to this object has been intentionally restricted or misconfigured, and either restore access or provide the current official installation procedure / replacement endpoint for PSpice for TI?

I can provide the installer log (cdsPspiceTIlog.txt) if needed.

Thank you.

RE: PSpice for TI installer fails: HTTP 403 Forbidden downloading TI_URLs.txt

IshaS — Fri, 30 Oct 2026 13:35:30 GMT

Hi ZS202610299347,

Can you please share the snapshot of the error message received.

Are you getting some installer output, can you please share it.

RE: PSpice for TI Installation Fails - HTTP 403 Forbidden

BD202610298111 — Fri, 30 Oct 2026 02:23:49 GMT

I can confirm the same PSpice for TI installation issue on October 30, 2026.

TIPSpice.exe fails while downloading TI_URLs.txt from pcb.cadence.com with HTTP 403 Forbidden.

The issue is reproducible across multiple installation attempts. Could Cadence confirm whether the download endpoint is currently unavailable and provide a supported workaround?

PSpice for TI Installation Fails - HTTP 403 Forbidden

BK202610272117 — Tue, 27 Oct 2026 15:54:52 GMT

Hello Cadence Support,

I am trying to install PSpice for TI after receiving my approved access key from Texas Instruments.

The installer fails with this error:

Error Code: HTTP 403 Forbidden

URL: https://pcb.cadence.com/startPages/PSpiceTI_data/TI_URLs.txt

The same URL returns HTTP 403 Forbidden when accessed directly through a web browser.

Our IT department has tested multiple computers and reviewed our network security policies without finding a restriction responsible for the failure.

Could you please verify whether this configuration file is accessible on the Cadence server and provide a solution or updated installation procedure?

Thank you.

RE: PSpice for TI Installation Fails - HTTP 403 Forbidden

JB202610233122 — Tue, 27 Oct 2026 20:04:16 GMT

I have the same issue with Pspice for TI. TI says this is a Cadence issue.

The installation is "Unable to access the URL required for installation" and it refers to a Cadence URL.

Please help!

RE: PSpice for TI Installation Fails - HTTP 403 Forbidden

BK202610272117 — Tue, 27 Oct 2026 18:29:52 GMT

Subject: PSpice for TI 2024 — VBL License Registration Missing (Error -2089)

PSpice for TI 2024 (23.10.001) has been installed successfully, but Capture cannot obtain its license.

The original TI installation launcher cannot download TI_URLs.txt because the Cadence URL returns HTTP 403 Forbidden.

I downloaded the official installation package from TI's server and verified all 20 files against their published SHA-256 hashes.

The licensing diagnostic reports:

VBL internal error: -2089
Registry key Vlt missing (Windows error 2)
VBL configuration data not found in the registry
Missing TI_PSpice_231 license file

The official Cadence licensing connection-test page reports Successful Connection.

I still have my original registered email address and TI access key.

Please provide the supported procedure to complete VBL user authentication, installation registration, license request, and license download without repeating the full software download.

If a registration repair utility is required, please provide the official utility and instructions.

How can I export and view PSpice simulation results in MATLAB?

IshaS — Mon, 26 Oct 2026 13:48:03 GMT

Allegro PSpice Simulator provides an interface with MATLAB that allows you to export simulation waveform data for advanced plotting, visualization, and further analysis.

After running the PSpice simulation and plotting the required traces, configure the MATLAB installation path using:

Tools> MATLAB >Set MATLAB Path

Set the path to:

<MATLAB installation>\bin

To export simulation data, go to:

Tools > MATLAB >Export Selected Traces

The Export to MATLAB window allows you to:

Select one or more traces for export.
View simulation variables in Flat or Hierarchical format.
Select the required section for multi-section simulations.
Specify a MATLAB variable name for the exported data.
Use the default plotTraces function to visualize the traces in MATLAB.

Click Export to transfer the selected trace data to MATLAB. If no variable name is provided, PSpice automatically creates a variable such as:

PSpiceData_<instance number>

You can then use MATLAB functions for customized waveform analysis, including advanced plots such as polar and 3D plots.

Happy Learning!!

Share Insights: Differential Impedance for an OPAMP

IshaS — Mon, 19 Oct 2026 10:57:20 GMT

You want to characterize how an OPAMP’s differential input impedance changes with frequency.

Which PSpice setup is most appropriate?

A. Use a 1 A AC current source across the differential input, perform an AC frequency sweep, and evaluate Vdiff/IAC

B. Apply a DC voltage source and perform Transient analysis

C. Run a DC Sweep and plot the output voltage only

D. Apply a sinusoidal source and calculate only the voltage gain

Try this and share your observations.
Happy Learning!

ERROR(ORCOMMN-2302): Cannot initialize profile.

VolkerD — Thu, 17 Sep 2026 06:40:46 GMT

Hello everyone,

after updating from Orcad X 24.1 to 25.1 I get the error message "ERROR(ORCOMMN-2302): Cannot initialize profile." when I want to create a new Pspice simulation profile.

Same when I open an old project from 24.1 with 25.1. No problem when using 24.1. Latest Hotfix is installed

Any ideas how to solve this? Thanks in advance!

RE: ERROR(ORCOMMN-2302): Cannot initialize profile.

VolkerD — Wed, 07 Oct 2026 13:22:54 GMT

Hello Isha.

Thanks for your answer. That process created a new registry folder "CaptureWorkspaceEx".

Unfortunetaly ist didn' solve the problem. Still getting error "ERROR(ORCOMMN-2302): Cannot initialize profile." when I want to create a new Pspice simulation profile or open an old project with existing simulation profiles.

Would appreciate other ideas.

Best regards!

PSpice Special Components: IPRINT, IPLOT

AyushD — Tue, 29 Sep 2026 16:13:51 GMT

IPRINT

Use this component to print current through a specific device in your simulation output file. This component works like an ammeter. To print current through a specific device you need to insert this component in series. This component enables you to print current through the device in simulation output (.out) file. In below image,IPRINT lists current in tabular format through the device R_LOAD.

You need to configure one or more parameters on this symbol instance from following list to use this in simulation flow.

Analysis Type: Assign any value to one of the variables AC/DC/TRAN, depending upon the analysis you are performing. For example if your simulation profile is configured for Transient Analysis you should set TRAN property value as 1.
Functions: You can use following special function on output nodes
- DB
- PHASE
- REAL
- MAG
- IMAG

You can use one or more of the parameters at a time. To select these you need to assign any value to these parameter, say, 1.

For example if you have set DB and PHASE values to 1 on symbol instance and this component is connected to node VOUT, it will print following in output file:

DB of Voltage at VOUT node
PHASE of Voltage at VOUT node

IPLOT

Use this component to plot current through a specific device in your simulation output file. This works identical to IPRINT, only difference being that it generates PLOT instead of tabular data.

How to define measurement statements to get simulation output results in a textual format ?

AyushD — Mon, 03 Feb 2025 12:02:34 GMT

Allegro PSpice Simulator allows us to define measurement statements that can analyze simulation data of different analysis types and generate a text file with measurement data on the output simulation waveform.

You can use the `.MEAS` or `.MEASURE` command the `.MEAS`. The measurements are assigned to unique variables defined by the user, which can be invoked in other measurement expressions.

To use these measurements, you can create a new text file with the `.inc` extension and add the measurement commands.
Configure the file in the design simulation settings.

The measurement results will be generated as a text file inside the project folder after a successful simulation.

There are several types of measurements you can perform using the `.MEAS` command:

1. `TRIG...TARG`: Find the difference in the x-axis value (time/frequency/variable) when conditions are met (between the trigger point and the target point)
2. `FIND...WHEN`: Find the value of the argument when the specified condition is met.
3. `AVG, MIN, MAX, PP, RMS, MIN_AT, MAX_AT`: Calculate average, minimum, maximum, peak-to-peak, RMS, minimum at, and maximum at values.
4. `PARAM`: Measure a parametric expression defined in curly braces.

The general syntax for the `.MEAS` command is:
.MEASURE {DC|AC|TRAN} <measurement variable name>

Example: Find the average voltage of the node ‘out’ within a time interval of 1 ms to 1.2 ms.

.MEAS TRAN avg_out_vAVG V(out) FROM 1m TO 1.2m

Result: AVG_OUT_V: AVG(V(OUT))= 3.9711E+00 FROM 1.0000E-03 TO 1.2000E-03

RE: How to define measurement statements to get simulation output results in a textual format ?

AyushD — Tue, 29 Sep 2026 16:03:25 GMT

This feature is supported in 24.1 and later releases.
Looks like you are using 17.4 hence the command is not recognised.

RE: ERROR(ORCOMMN-2302): Cannot initialize profile.

IshaS — Mon, 28 Sep 2026 06:29:54 GMT

Hi Volker, Yes, please delete the complete CaptureWorkspaceEx folder/ or create backup of it by renaming it to CaptureWorkspaceEx_backup.

RE: ERROR(ORCOMMN-2302): Cannot initialize profile.

VolkerD — Wed, 23 Sep 2026 06:58:02 GMT

Hi Isha,

thanks for your answer.
Just to make sure what you want be to try...

This is the structure in my registry:

\CaptureWorkSpaceEx\24.1.0\BCGWorkspace
\CaptureWorkSpaceEx\24.1.0\D:\PSPICE_WORKING_DIR\cdssetup\OrCAD_Capture/24.1.0/capture.ini\

\CaptureWorkSpaceEx\25.1.0\BCGWorkspace
(no subfolder "\PSPICE_WORKING_DIR" here)

Should I delete the hole folder \CaptureWorkSpaceEx with all subfolders?
Or only the subfolder \25.1.0?
Or something else?

24.1 is working fine, the problem only occurs for 25.1. The subfolders to PSPICE_WORKING_DIR are missing there.

Thanks in advance and best regards!

RE: ERROR(ORCOMMN-2302): Cannot initialize profile.

IshaS — Wed, 23 Sep 2026 05:41:32 GMT

Hi Volker,

Can you please try below:

Select File > Exit to close Capture and PSpice application (if running).
Go to Windows Task Manager and close all cadence running tools.

Now, Delete the Capture workspacex registry from registry editor:

HKEY_CURRENT_USER\Software\OrCAD\CaptureWorkSpaceEx

Now, invoke PSpice standalone by selecting PSpice AD in Start menu.
Now start OrCAD Capture CIS, open the design, and check the problem.

Try this and let me know how it goes!!

RE: How to define measurement statements to get simulation output results in a textual format ?

JX202609134513 — Mon, 14 Sep 2026 07:48:12 GMT

I have tried the method you suggested. I added an .inc include file under Configuration Files in Cadence Capture CIS 17.4. This .inc file contains only one single line: .MEAS TRAN VOUT_at_5ms FIND V(VOUT) AT=5ms

After running the simulation, I encountered an error message in the .out output file as shown below:

【**** INCLUDING my_measure.inc ****
.MEAS TRAN VOUT_at_5ms FIND V(VOUT) AT 5ms
$
ERROR(ORPSIM-16056): Unrecognizable command】

I replaced .MEAS with .MEASURE, but the error remained unchanged. Could you please advise why this error occurs and how I can resolve it?

RE: How to define measurement statements to get simulation output results in a textual format ?

JX202609134513 — Mon, 14 Sep 2026 07:18:31 GMT

After running the simulation, I encountered an error message in the .out output file as shown below:

【**** INCLUDING my_measure.inc ****
.MEAS TRAN VOUT_at_5ms FIND V(VOUT) AT 5ms
$
ERROR(ORPSIM-16056): Unrecognizable command】

I replaced .MEAS with .MEASURE, but the error remained unchanged. Could you please advise why this error occurs and how I can resolve it?

RE: problems with smoke simulation

IshaS — Fri, 11 Sep 2026 09:44:05 GMT

Hi Digital1,

There seemed to be symbol name and pin-mismatch.

Great issue is resolved.

problems with smoke simulation

digital1 — Mon, 07 Sep 2026 10:30:11 GMT

I have a simple resistive circuit R1 and R2, R2 comes from the menu Place / PSpice Part/ Resistor and R1 comes from my CIS Cip database.

I have all the smoke parameters set up the same but for the R1 I have
the following non fatal errors

Voltage Data not found for smoke test RV

Please verify save data and data collections options in the simulation profile

R2 gives me the voltage data expressed as RV but R1 from my cip database does not

Has anybody else found this error and if so how do I correct it

RE: problems with smoke simulation

digital1 — Thu, 10 Sep 2026 16:25:16 GMT

Hi IshaS I found a workround my capture symbol was called resistor and the pspice symbol was called R when I renamed my capture symbol to R the problem went away sounds like one of those silly bugs