August 4, 2020, update for Project 2016 (KB4484477)

Applies to: Project Standard 2016Project Professional 2016

This article describes update 4484477 for Microsoft Project 2016 that was released on August 4, 2020.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?).

Improvements and fixes

This update fixes the following issues:
  • There's no warning information when you select the Refresh button under the Engagements tab, and you have new engagements that have not been saved. You should see the message "You have unsaved changes to some engagements. Refreshing will cause you to lose these changes. Do you want to continue refreshing the engagements?".
  • The TaskDependencies.Add method fails when the following conditions are true:
    • Project is connected to the server.
    • You define comma (,) as the decimal separator in locale settings and you have Project's display language set to, for example, German.
    • The project is saved to the server.
    • The Lag parameter of the method is specified, and its value doesn't equal a whole number. For example, 2,5 vs. 2.
  • From within Project Web App, when you open a project in Project Professional, you see an error message like the following:
    "Project Professional must be running online before your project can be opened. Configure Project to connect to Project Web App and try again."
    This problem occurs when your Project Web App URL ends with ".com" that's similar to "".
  • After you save a project as a PDF or XPS file to a document library, the PDF or XPS file doesn't exist in the document library.

How to download and install the update

Microsoft Update

Use Microsoft Update to automatically download and install the update.

Download Center

This update is only available for manual download and installation from the Microsoft Download Center.

If you're not sure which platform (32-bit or 64-bit) you're running, see Am I running 32-bit or 64-bit Office? Additionally, see more information about how to download Microsoft support files.

Virus-scan claim

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Update information


To apply this update, you must have Microsoft Project 2016 installed.

Restart information

You may have to restart the computer after you install this update.

More information

How to uninstall this update

Windows 10

  1. Go to Start, enter View Installed Updates in the Search Windows box, and then press Enter.
  2. In the list of updates, locate and select KB4484477, and then select Uninstall.

Windows 8 and Windows 8.1

  1. Swipe in from the right edge of the screen, and then select Search. If you're using a mouse, point to the lower-right corner of the screen, and then select Search.
  2. Enter windows update, select Windows Update, and then select Installed Updates.
  3. In the list of updates, locate and select KB4484477, and then select Uninstall.

Windows 7

  1. Go to Start, enter Run, and then click Run.
  2. Enter Appwiz.cpl, and then click OK.
  3. Click View installed updates.
  4. In the list of updates, locate and select KB4484477, and then click Uninstall.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.
project-x-none.msp file information
File identifierFile nameFile versionFile sizeDateTime

project-x-none.msp file information
File identifierFile nameFile versionFile sizeDateTime


Learn about the standard terminology that is used to describe Microsoft software updates. The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office.