Allegro X PCB Editor - Recent Threads

Performance Advisor in Allegro X PCB Editor: Identifying and Resolving Database Performance Bottlenecks

vidhyaparameswari — Fri, 16 Oct 2026 11:29:01 GMT

Large and complex PCB designs can sometimes experience slower interactive operations, delayed DRC updates, or reduced editing responsiveness. To help diagnose and address these issues, Allegro X PCB Editor includes the Performance Advisor, a diagnostic utility integrated within the Database Check (DB Doctor) workflow.

What is Performance Advisor?

Performance Advisor is a specialized analysis tool that examines the PCB design database and identifies conditions that may contribute to degraded application performance. Instead of manually investigating potential causes, designers can use Performance Advisor to pinpoint database settings, constraint configurations, and design characteristics that may be impacting responsiveness.

The tool provides actionable recommendations that help improve design efficiency and overall editing performance.

Benefits of Using Performance Advisor

By routinely running Performance Advisor, users can:

Identify database-related performance issues before they become critical.
Detect constraint configurations that may cause slow editing operations.
Receive practical recommendations for improving design responsiveness.
Optimize shape handling and database settings for large designs.
Improve overall PCB layout productivity and user experience.

How to Access Performance Advisor

Performance Advisor is available through the Database Check (DB Doctor) utility in Allegro X PCB Editor.

Navigation Path:Tools→ Database Check

Running Database Check launches the analysis process, where Performance Advisor evaluates the current design and presents any detected performance concerns along with recommended corrective actions.

pin is shifted after generating gerber file

Siri — Tue, 06 Oct 2026 05:54:15 GMT

The cusom pin is shifted in the gerber, it looks fine and on the board and footprint it is shifter in the gerber

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Airgap is reduced after uprev

Siri — Mon, 28 Sep 2026 05:30:52 GMT

Hello,

After upgrading from version 16.6 to 24.1, the airgap is getting reduced automatically.

Could you please let me know what could be causing this behaviour? Is there any setting or change in the newer version that could affect the airgap?

Thanks

Markups

Bennigin — Wed, 23 Sep 2026 12:33:17 GMT

When trying to add a Markup to my design, PCB editor crashes when I click submit. Anyone else seen this issue and found the solution? I have tried it using version 24.1-2024-S010 and 25.1-2025-S050.

Thanks

How to Use Allegro Text Blocks as the Default Font Instead of TrueType Fonts in 25.1 ?

Electro Node — Thu, 17 Sep 2026 06:01:12 GMT

Hello Everyone,

I’m looking for a way to use Allegro Text Blocks as the default font for newly created text instead of TrueType Fonts (TTF).

Is there a configuration, environment setting, or recommended workflow that allows all new text to automatically use Text Blocks by default?

Thanks!

Differential pair pad entry

YJ202407185547 — Wed, 16 Sep 2026 15:54:47 GMT

Hi,

The differential pair entry into a pad in allegro 23.1 was ortogonal

However, Since I uploaded allegro 25.1 the differential pair entry is different and I'm not able to route it orthogonal to the pad:

Does anyone know how to change the entry?

Thank you in advance.

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(SPMHGE-779): Place replicate module component net profiles incompatible with design module instance 'CR_xxxxxx_MAPPED1_1'. Instance not modified.

TT202608257415 — Wed, 02 Sep 2026 13:31:41 GMT

Hi,

I get the following error in OrCAD X PCB Professional 25.1-2025 S030 [3/25/2026] Windows SPB 64-bit Edition: (SPMHGE-779): Place replicate module component net profiles incompatible with design module instance 'CR_xxxxxx_MAPPED1_1'. Instance not modified.

This error appears when I try to replicate apply an MDD file. Please see below workflow hat leads up to the error.

1. Extract an mapped module from an existing board (origin.BRD) by selecting module --> RMB "Place replicate update" and save as origin.MDD

2. Create new board (new.BRD) and import netlist from origin.BRD

3. Quickplace all components and select all components --> RMB "place replicate apply" --> choose origin.MDD

4. The module attaches to the cursor ready to be placed --> then placed within outline.

5. PCB Editor is busy for 10 seconds and places the module in the outline, but in the command window the above mentioned error appears.

I tried to find information online but I cannot find any explanation of this error or the severity of this error (can it be ignored?). And what does it exactly mean that the instance is not modified?

Thanks in advance.

Join us on Wednesday, Sep 9th 2026 for our next LIVE Ask me Anything Session on 'Allegro X PCB Editor Libraries: Creation and Management”

Renu Vibha — Mon, 31 Aug 2026 05:53:57 GMT

Our next session offers a blend of theoretical insights and practical applications, tailored to enhance your understanding of cutting-edge design principles. As always, each session is moderated by Cadence Engineer providing valuable knowledge and actionable techniques.

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How to install Allegro Free Physical Viewer 16.6？

EL202608245635 — Thu, 27 Aug 2026 16:41:28 GMT

I want to install "Allegro Free Physical Viewer 16.6" to view an old .brd file with old version(16.6), but it is not available on the Cadence website.

Could a moderator please provide me with the download?

DFF Backdrill to Pad

PCB6453 — Wed, 26 Aug 2026 20:01:45 GMT

Hello All,

I'm setting up my DFF constraints for backdrills on vias. The value that I have for Backdrill to antipad is 10 mils. I'm unsure of what value I need to put in for Backdrill to pad if I want the whole pad removed.

Thanks!

De assign netname for multiple pins at same time in allegro

Sriranga — Sat, 22 Aug 2026 08:14:15 GMT

We can assign the netname to the multiple pins at a same time by using following option( file- import- logic) in PCB editor.

As like that I need to de-assign the multiple pins from different nets.Is there any default option?

For dense board if need to de assign the netname for multiple pins, currently i am deleting entire nets and then I import the netlist...this process give lot of reworks. If anyone have solution for this please give your guidance.

How to Change the Color of Embedded Component RefDes in Quick View (Placement Layer) in Allegro X PCB Editor?

Electro Node — Fri, 21 Aug 2026 18:28:30 GMT

Hello Everyone,

I am using the Quickviews feature in the Visibility pane of Allegro X PCB Editor to quickly display placement information such as component reference designators, pins, and package boundaries during component placement.
The Placement: TOP and Placement: BOTTOM Quickviews work well for viewing RefDes information without enabling additional subclasses. However, I have noticed that the Reference Designators (RefDes) of Embedded Components appear with a specific default color when displayed through Quickviews.
Is there a way to change the display color of Embedded Component RefDes shown through the Quickviews option?

Regards,

Dileep

NC Drill Holes Appear Offset from Gerber Artwork

Electro Node — Fri, 14 Aug 2026 16:27:43 GMT

Hello Folks,

I have completed my PCB design and am at the stage of sending the manufacturing data to the fabricator. Before releasing the data, I wanted to verify the generated Gerber and NC Drill files myself.

While reviewing the outputs in a Gerber viewer, I noticed that the drill holes appear offset from the artwork data, which does not look correct. The board database itself seems fine, but the generated output files show a mismatch between the drill locations and the Gerber artwork.

What could be causing this offset, and how can it be corrected before sending the manufacturing package?

Thanks,

Creating Manufacturing Outputs Made Easy

Renu Vibha — Thu, 13 Aug 2026 05:43:09 GMT

Are you confident in generating accurate Film Control Records and Gerber files for your PCB designs?

This video demonstrates the creation of artwork film control records and gerber files from within the Allegro X PCB Editor

How to create Film Control Records and Gerber Files from within the Allegro X PCB Editor

Request for Allegro Board File to ASCII Conversion Guidance

PK202511125928 — Tue, 11 Aug 2026 08:59:06 GMT

Hi Team,

I need to convert an Allegro PCB board file (.brd) into an ASCII format (.alg/ASCII dump) for further processing and review.

Could you please advise on the recommended procedure or share the appropriate utility/tool and command to perform this conversion? If there are any version-specific requirements or scripts that need to be used, please let me know.

What is Preventing Designers from Improving Decoupling?

John T — Mon, 10 Aug 2026 18:16:25 GMT

We see many designs every day but most do not follow the performance recommendations when it comes to power and ground via placement for decoupling capacitors.

Why ?

What is preventing you from pushing your designs to perform at their electrical best:
1. Is it costs?
2. Is it due to manufacturing or fabrication?
3. Is it speed for design completion or DRC management?

The highest level recommendation is to place grounding and power vias inside the capacitor pads

Let’s share some industry experience if anyone has overcome these hurdles or have suggestions or reasons for the approach.

Appreciating any thoughts or comments below.

mounting IC in 45deg

Steik — Mon, 10 Aug 2026 10:46:11 GMT

Hi, I tried to mount a IC in 45 degrees, and that resulted in a landslide of pin to pin spacing DRC.

if I set the ic in 45deg iI get this error:

Constraint Type: NET SPACING CONSTRAINTS

  Constraint value: 0.2 MM

  Actual value:     0.1999 MM

if I measure the Air Gap = 0.1999952 mm

if I set the IC to 90deg I get no errors, and Air gat measures to 0.2mm so a difference in 4,8nm

Can't Orcad do math?

Can this be fixed?

Allegro PCB on a Mac with ARM processor

GM303 — Fri, 07 Aug 2026 13:45:18 GMT

I’ve been using the tools on a Mac through a Parallels virtual machine with a USB dongle for many many years. My Intel-based Mac is getting old, and I now need to move to a Mac with an Apple silicon processor.

Has anyone here faced the same issue and found a working solution?

Yes, I know that Cadence does not officially support running these tools on Apple computers.

Unable to generate report for User defined properties

Siri — Thu, 06 Aug 2026 11:54:35 GMT

Hello,

While generating the custom report, the user-defined properties are not included in the generated report. These properties are visible in the Show Element but they do not appear in the report output.

Thanks

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Timing Vision -Timing Modes ?

BC202603263145 — Mon, 03 Aug 2026 11:55:11 GMT

Hi,

What are these different modes in Route-Timing Vision refer to?

Downrev Issue

Siri — Fri, 31 Jul 2026 11:24:43 GMT

Hello,

While downconverting from 25.1 to 23.1 below issue appears, I tried to delete all the text but still the issue persists

Kindly let me know if you have any script to run to resolve the issue

Thanks

Join us for our next LIVE Ask me Anything Session on Constraint Manager : Your Questions, Expert Answers

Renu Vibha — Thu, 30 Jul 2026 06:28:37 GMT

Struggling with constraints? Looking to optimize your PCB design workflow?

LIVE Constraint Manager Ask Me Anything Session is your opportunity to connect with Cadence experts to get answers, tips, and best practices for real-world design challenges.

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🔹 Physical Constraints
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