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Fix Microsoft Project Error ID 10102 When Opening a Project

WPS Content Manager Oct 1, 2026 869 views

Question details

A specific project fails to open from Project Web App into the Project desktop client, displaying Error ID 10102 in the active cache.

How to Fix Microsoft Project Error ID 10102

Product: Microsoft Project
Device & OS: not provided
Scenario: Opening a project from Project Web App for editing in the Microsoft Project desktop client.
Observed behavior: The project refuses to open, and the active cache shows Error ID 10102, indicating that the locally cached data is inconsistent with the server data.

Before you start

Ensure you save any unsaved work in other active projects and completely close the Microsoft Project desktop client before attempting to modify cache files.

Solution 1Recommended

Clear the Recent Local Cache File

Deleting the inconsistent local cache file forces Project to download a fresh, uncorrupted copy from the server, which usually resolves Error 10102.

The most common cause of this error is a desynchronization between your local computer's cache and the Project Web App server. Clearing the specific cache folder allows the application to rebuild the data.

Find the Cache Location

Open the Microsoft Project desktop client. Navigate to File > Options > Save, and copy the file path listed under the 'Cache' section.

Close Microsoft Project

Exit the Microsoft Project application completely to ensure no files are locked during the deletion process.

Delete the Cache File

Open File Explorer, paste the copied cache path into the address bar, and press Enter. Locate the most recently dated cache file in this folder and delete it.

Reopen the Project

Log back into Project Web App, navigate to the Project Center, and attempt to open the project in the desktop client again.

Tip: If you are unsure which file is the most recent, sort the folder by 'Date modified' in descending order to easily identify the latest cache file.

Solution 2

Save as a New Project and Check Server Jobs

If clearing the cache fails, you may need to save the project under a new name and investigate stuck queued jobs on the server.

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Frequently Asked Questions

Why does Error ID 10102 occur in Microsoft Project?

This error typically happens when the local cache data on your computer becomes inconsistent with the data stored on the Project Web App server, preventing the project from synchronizing and opening properly.

Why is the Cancel Jobs button disabled in Project server settings?

The Cancel Jobs button may be grayed out if your account lacks administrative permissions, or if the server queue is experiencing a lock state that requires a global administrator to force-clear the stuck jobs.

What should I do if my renamed project doesn't appear in the project list?

If a project uploaded under a new name doesn't show up, there might be a synchronization delay or a stuck job in the server queue blocking the database update. Ask your Project admin to check the server queue status.

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