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Multisim | Library Repack

To "repack" or prepare a custom component library in NI Multisim, you typically use the Database Manager

to consolidate, move, or import components into a single accessible

file. This process is essential for sharing a specific set of parts with others or moving them between workstations. 1. Consolidate Components for the Library

Before "repacking" a library, you must gather all custom components into your User Database Save Existing Parts

: If you have components in a circuit that aren't in your library yet, right-click the component and select Save component to database Copy from Master : To include standard parts in your custom pack, go to Tools » Database » Database Manager , select the component in the Master Database , and click to move it to your User Database NI Community 2. Export as a Portable Library (.PRZ)

The standard way to "repack" specific components into a shareable file is through the export function. Open Database Manager : Navigate to Tools » Database » Database Manager and select the Components Select Components : Choose the User Database from the dropdown. Hold

to select all the components you wish to include in your "pack". : Click the button. Save the resulting

file to your desired location. This file now contains the symbols, models, and footprints for those parts. National Instruments 3. Move the Entire Database File (.USR)

If you want to "repack" your entire custom library at once, you can copy the raw database file. Locate the File : In Multisim, go to Options » Global Preferences and check the tab to find the User Database path Copy the .USR File : Navigate to that folder in Windows Explorer and copy the file (usually named Usr_comp.usr

: On the new system, place the file in a known folder and update the Global Preferences path to point to it. National Instruments 4. Importing the Pack To use a "repacked" library on another machine: Tools » Database » Database Manager Select the (Open EDA) file you prepared. Choose the destination family in your local User Database National Instruments using the Component Wizard? Importing third party parts to database - NI Community 17 Mar 2010 —

A "Multisim Library Repack" usually refers to one of two things: a technical process for updating component databases in official NI Multisim software, or an unofficial community-modified installer. 1. Official "Repacking" of Libraries In the context of National Instruments (NI)

software architecture, "repacking" a library involves modifying a source file and rebuilding it into a single, optimized file. Packed Project Libraries (.lvlibp): multisim library repack

NI software uses these files to consolidate multiple components into one. If you need to add custom components or update existing ones, you must edit the source library and then it to update the software environment. Database Updates:

Users often seek "repacked" libraries to expand Multisim's default component list. The software includes a Component Wizard

(Tools > Component Wizard) to import or create custom components for your private or corporate database. NI Community 2. Unofficial Software "Repacks"

In the broader software community, a "repack" often refers to an unofficial, compressed installer of software like NI Multisim (e.g., Multisim 14.3).

These are typically created to reduce the installation size or to include pre-loaded component libraries and license bypasses (cracks). Availability:

Such versions are often found on forums or file-sharing sites but are not recommended

for professional or educational use due to security risks and lack of official support. Google Groups Key Status Updates for 2026 Multisim Live EOL: Support for the web-based Multisim Live platform is scheduled to end on September 15, 2026 . Users are advised to back up their data before this date. LabVIEW Integration: NI continues to update its ecosystem, with LabVIEW 2026 Q1

introducing improved debugging and VI comparison tools that interact with shared libraries. National Instruments to your existing Multisim library? Solved: Is there a way to unlock a packed project library?

Getting the right components into NI Multisim is key for a smooth simulation workflow. While official "repacks" aren't a standard NI release, the community often shares custom library collections to expand on the base software's parts.

Here is a guide on how to find, import, and manage Multisim library components. 1. Official Sources & Updates

Before looking for third-party repacks, check if the official database has what you need. National Instruments frequently releases database updates for Multisim. Database Search: To "repack" or prepare a custom component library

You can search for specific components, manufacturers, or families directly in Multisim via the Place > Component menu and using the Search button Library Import: If you have an

file (the standard format for Multisim libraries), you can import it by going to File > Open , navigating to the file, and dragging it into the workspace 2. Community "Repacks" & Custom Libraries

Users often compile "repacks" that include thousands of additional SPICE models and footprints (like Arduino modules, specific transistors, or newer ICs). Where to find them: Check community forums like Electro-Tech-Online

or engineering subreddits for updated links to user-contributed databases [5.1]. Installation: Most repacks come as a (packed database) or a set of files. To merge these into your system: Tools > Database > Merge Database Select the downloaded database as the "Source" and your User Database as the "Target." 3. Creating Your Own (Component Wizard)

If you can’t find a specific repack for the part you need, you can "repack" individual SPICE models yourself: Component Wizard: Tools > Component Wizard SPICE Models: You can often download a

file from a manufacturer’s site (like TI or ON Semi) and use the wizard to assign a symbol and footprint to it for use in your simulations [35]. 4. Exporting & Sharing

If you’ve built a custom library and want to share it (creating your own "repack"): Tools > Database > Database Manager Select your components and use the function to create a file others can import. specific component that isn't in your current library, or are you trying to fix a database error after a reinstall?

Here’s a blog post tailored for engineers, students, and hobbyists who use Multisim and need to organize or rebuild their component libraries.

3. Team Collaboration Nightmares

Engineer A designs a circuit using a custom MOSFET from their user database. Engineer B opens the file but gets a "Component not found" error because their library lacks the exact part. A standardized repacked library ensures parity.

Step 3: Export Components to Intermediate Format

• Select multiple components in Database Manager.
• Choose Export → Multisim Database File (.mldb) for newer versions or .cmp for legacy.
• Store these in a folder named Raw_Export.

9. Best Practices

• Keep original source copies; preserve vendor-supplied files unchanged in an /originals folder.
• Use a manifest and semantic versioning.
• Automate repetitive steps with scripts to avoid human error.
• Include a minimal test-bench suite and instructions for re-running tests.
• Maintain strict naming rules for pins, symbols, and footprints.
• If redistributing, include license files and respect vendor restrictions.

Sample Batch Script (for Windows):

@echo off
:: Multisim Library Repack Automation Script
set MULTISIM_PATH="C:\Program Files\NI\Circuit Design Suite 14.3"
set EXPORT_DIR="D:\Repack_Output_%DATE%"
mkdir %EXPORT_DIR%
:: Export user database to CMP
%MULTISIM_PATH%\cmdlauncher.exe -ExportDB -DBType=User -Format=CMP -Path=%EXPORT_DIR%
:: Run external dedup script (Python)
python dedup_cmp.py --input %EXPORT_DIR% --output %EXPORT_DIR%_clean Select multiple components in Database Manager
:: Re-import into fresh database
%MULTISIM_PATH%\cmdlauncher.exe -CreateDB -DBName="Repacked_User"
%MULTISIM_PATH%\cmdlauncher.exe -ImportDB -DBType=User -Format=CMP -Path=%EXPORT_DIR%_clean
echo Repack complete.

Schedule this script monthly via Windows Task Scheduler to maintain an optimal environment.

5. Common Challenges

• Proprietary/binary formats: older Multisim formats may be opaque and require the original software to extract/convert.
• Model fidelity: when converting models (e.g., behavioral, vendor SPICE), subtle parameter or syntax differences can change simulation results.
• Name collisions: components from different vendors using identical reference IDs or symbols.
• Footprint mismatches: symbol pin ordering vs. PCB footprint pad mapping can cause layout errors.
• Licensing and IP: vendor models may be licensed with redistribution restrictions.
• Version compatibility: component schemas and file formats change across Multisim releases.

Part 7: Sharing Your Multisim Library Repack

So you have created the ultimate repack. Now share it responsibly.

Strategy: Database Union Repack

1. Download the vendor’s official Multisim library (often a .PRZ or .USR file).
2. Create a staging database (call it Vendor_Unpack.usr).
3. Import the vendor library into the staging DB.
4. Export the staging DB back to .CMP files.
5. Use a diff tool (e.g., WinMerge) to compare vendor .CMP against your corporate .CMP.
6. Manually resolve conflicts, preferring the vendor model for electrical parameters, but your corporate symbol for schematic standards.
7. Reimport the resolved set into the final Corporate database.

This ensures you have the best of both worlds: accurate simulation + consistent board layout.

Introduction: The Hidden Bottleneck in Your PCB Design Workflow

For electrical engineers, students, and hobbyists, National Instruments’ (now part of Emerson) Multisim is the gold standard for analog, digital, and power electronics simulation. The software’s power hinges on one critical element: your component library. Yet, as projects scale from a simple transistor amplifier to a complex microcontroller-based PCB, the default library becomes a jungle of duplicate parts, missing models, and outdated symbols.

Enter the concept of the Multisim Library Repack.

A "repack" in this context does not refer to software piracy or cracked installers. Instead, it is a professional optimization process: reorganizing, deduplicating, validating, and compressing your Multisim component databases into a clean, portable, and efficient package. Whether you are migrating to a new PC, sharing a project with a team, or simply trying to reduce simulation errors, mastering the library repack is an essential skill.

This article will guide you through why, when, and how to perform a complete Multisim library repack, transforming your workflow from chaos to clarity.

A. 1.Save your designed letterhead as an image file.
2.Open MS Word(*.doc)
3.In Word Doc, go to menu: Format->Background->Printed Watermark
4.Select a the letterhead image that you saved in step 1.
5.Choose scale 100% and uncheck Washout option. Click OK. You are done.

Q. How do I print a list of name badges on the same page?

Q. I closed the property window. How do I get it back for changing the properties(color, size, tilt angle etc.) of an element?

Q. How can I send my design to a printshop for professional printing?

Q. How do I use new font with the application?

Q. How do I use an image file that is in an unsupported format?

Q. How do I connect to my data files?

A. Click on the "Set Database" button on the left side as shown below.
You can also click on menu: File-->Database Settings to set up your data files.
Then go to menu: Insert-->Text From Database to insert a text.

Q. I want to print address labels from my Excel files. Do I need to know SQL?

Q. How do I print only one label at a specified location on my sheet?

A. Suppose you have a sheet of 10x3 (30 TOTAL) labels and you want to print one label in position 8th row and 2nd column.
Then you choose this option in print window:
No. of rows=8
No. of cols=2
Start printing from row=8, col=2.
See illustrated image. The postion marked yellow will only be printed.

Q. How do I convert my date to format like January 5, 2005 or 01/05/2005 etc.?

A. MS Excel return the value as YYYY/MM/DD HH:MM:SS. You need to convert using SQL like this:

SELECT * Format(CStr(MyDate),'mmmm dd, yyyy') as DateNew FROM [Sheet1$]
[This will convert the date to this format: January 5, 2005]

SELECT Format(CStr(MyDate),'mm/dd/yyyy') as DateNew FROM [Sheet1$]

[This will convert the date to this format: 01/05/2005]
You can use many other format strings like Format(CStr(MyDate),'m/d/yy'), Format(CStr(MyDate),'m-d-yy'),Format(CStr(MyDate),'mm-dd-yyyy') etc. Put the SQL statement in the text box as show below:

Q. How do I join 2 fields into one. Like FirstName, LastName into one single line, or Addrs1, addrs2 into one field?

A. First connect to your datafile as mentioned here. Then follow these steps.

Step 1:

Select the 2 fileds(example FirstName, LastName) you want to join by holding "Ctrl" Key and clicking on them.

Step 2:
Then click on the tool button as shown, or select from menu: Tools->Merge selected DB-Texts Select

Q. How do I add automatic label counter, like 1 of 100, 2 of 100 or 1/100 ?

A. Use [#num#] in text.

Q. How can I pull data from 2 or more sheets from a single Excel file?

A. You can pull data from 2 or more sheets from an excel file. You will need to use SQL statement in data source window. Here is a sample SQL for this sample.xls file:

SELECT [SheetName$].Name, [SheetAddress$].Address FROM [SheetName$] , [SheetAddress$] where [SheetName$].ID=[SheetAddress$].ID

Q. How do I connect to my data files, Access or Excel sheet?

A. Steps 1:
Click on menu: File-->Database Settings to set up your data files.

Steps 2:
Then go to menu: Insert-->Text From Database to insert a text as shown.

Steps 3:
Then click on the text. You will see "<<TextFromDB>>" .

After that you will see a dropdown in the properties area. In the dropdown you will see all the columns that your Access Table or Excel Sheet has. Select the column(e.g. Name) to show in this text element.

Steps 4:
Repeat step 2 and 3 to select other columns (e.g, Address, City etc.)

Steps 5:
Go to menu File->Print Preview to see a preview as shown. If things look fine, print your labels.