web analytics
Close this search box.


How to Fix Sage 50 Can’t Open Company File Error?

Sage 50 Can't Open Company File

Encountering the error message Can’t open company file [filename]. The file is currently being used by another application when attempting to open a data file can be frustrating. This error indicates that the specified company file is inaccessible because it is currently in use by another application. 

The error can occur due to conflicts caused by other programs restricting access to the company file, network configuration issues, or incomplete installations. Identifying and addressing these factors is essential for resolving the error and restoring access to the company file.

It mainly happens when there are missing files, corrupted data paths in a file named configuration (INI) on a system, incorrect permissions, or data path errors. In this article, we’ll explore various ways to address the issue.

Causes of Sage 50 Error Loading Company File
The company file you are trying to open is considered invalid.
There is inconsistency in using the same version of Sage 50 across all workstations.
Service Release is not uniformly installed on all computers.
One workstation was accessed before completing the installation process.There’s a discrepancy in the build or release among the computers involved in creating and storing the backup file.
The company file has not been accessed in the new version.
Company files are stored in a location different from the specified data path
The workstation was locally installed using a mapped drive.
Transitioning from a single-user license to a multi-user license.
Missing.SAJ or.SAI file

Also Read:- How to Resolve Sage 50 Login Error?

How to Fix Sage 50 Error Loading Current Company File Issue?

1: The file is located on the local computer and nobody is working on it at this time

  1. Restart the computer on which the file is stored.
  2. Attempt to open the file once more.

2: Open the file in multi-user mode

  1. Ensure the company isn’t already open on the Task Bar.
  2. Confirm whether other users have accessed the company in Single User Mode.
  3. Identify the machine that’s operating in Single User Mode and navigate to File, then Switch to Multi-User Mode.

3: Access Task Manager to the end processes

  1. Shut down all Sage 50 Accounting applications across all devices.
  2. Access the Task Manager on the computer where the data is stored. To do this, press Ctrl + Alt + Del and select Task Manager.
  3. Go to the Processes tab.
  4. If there’s an option to display processes from all users, make sure to activate them.
  5. Locate the mysqld.exe process and select End Process.

Note: The process name might mysqld-nt.exe.

Go to the folder containing the SAJ company file and manually remove the process.pid file.

  1. If the issue persists, restart the computer or server.

4: The data file resides on the server, but I am unable to access the server right away

  1. Launch Explorer.
  2. Transfer the SAJ & SAI files from the server to your desktop as a temporary solution.
  3. Access the company file stored on the desktop.
  4. If the file fails to open: Restore the most recent backup to the server.
  5. If the file opens successfully: Close the company file.
  6. Wait until server access is available.
  7. Restart the server.
  8. Replace the SAJ & SAI files on the server with the copies from the desktop.
  9. Delete the desktop copies of the SAJ & SAI files.

5: The data is in My Documents, which is redirected to a server, and there’s no Process. pid in the SAJ folder.

  1. Copy the.SAJ folder and.SAI file to the C: drive of your local computer.
  2. If you manage to open the file from its new location, click on “File,” then choose “Save as,” and store it back where it originally was (like in your documents folder), but give it a different name.
  3. Delete the.SAJ folder.
  4. A message may appear indicating that you can’t delete the folder and that renaming the original folder is not possible.

6: Encountering an identical error message when attempting to open my sample company.

  1. Install any pending Windows Updates.
  2. Restart the computer.
  3. If the error persists despite not being displayed, and you still cannot open the sample company, with the program freezing:
  1. Reboot the computer.
Get our Sage expert on call
to resolve your query in no-time.

7: The firewall on the server is causing a blockage.

  1. Disable the Anti-virus on the Server.
  2. Disable the Firewall on the Server.
  3. Depending on the network configuration, you may also need to disable these items on the Workstations.

8: Incorrect Serial Number

  1. Access Help and select “Upgrade your Sage 50 product.”
  2. Verify that you are using the correct serial number.
  3. Repeat these steps on all computers.

9: User Table Inspection

  1. Launch the company file on the Workstation.
  2. Switch to multi-user mode.
  3. Open another instance of Sage 50.
  4. Log in with a second user account for the same company.
  5. If access is not granted, the problem may be connected to the user table.
  6. Consider implementing a password override.
  7. Request an evaluation of the file for potential data damage.

Also Read:- Resolve: ‘Error 1920: Sage 50 Accounts Data Service Failed to Start’


When you see the message “Can’t open company file [filename],” it means, another program is using the file, disrupting your work.  After understanding the causes behind this error and implementing the solutions mentioned in this article, you can effectively resolve the issue and regain access to your data files. Whether it involves closing conflicting applications, adjusting network settings, or addressing installation issues, resolving this error is essential for maintaining smooth operation within the accounting software environment. Get in touch with our Sage experts for immediate assistance at our toll-free number: +1-855-875-1223.

Frequently Asked Questions

Why is Sage 50 Accounting Not Opening?

Verify whether Sage 50 Accounts can be opened from the Windows Start menu. Verify that your machine has Internet Explorer installed. The removal of Internet Explorer could result in Sage Accounts malfunctioning. It’s not necessary to have Internet Explorer as your default browser.

Why Won’t Sage Payroll Open?

Your Windows user’s access level might be the only problem. Try opening Sage 50 Accounts and logging in as an administrator to test this. Try running Sage 50 Accounts as an administrator if you are unable to log in as an administrator: Select Properties by right-clicking on the Sage 50 Accounts shortcut.

How to Open Sage 50 Payroll?

1. Launch Sage 50 Payroll.
2. Input your account number, serial number, and activation key.
3. Select “Create a new set of data files” and proceed.
4. Enter your company details.
5. Set a password for the manager username and confirm it.
6. Input a security question and its answer.
7. If registered with HMRC for online submissions, provide your details.
8. Click “Finish” and enter the created password.
9. Close default reminders.
10. Update NI rates for the Spring Budget 2024.
11. For multiple companies, repeat steps 3 to 10.

Why is Sage Not Loading?

Why Sage is not loading could be due to various reasons, including software conflicts, corrupted installation files, insufficient system resources, or issues with Sage’s configuration settings.

How do I Repair the Sage 50 Company File?

Select All Programs, Sage, Sage 50 Accounting, and then Company File Check & Repair from the Windows Start Menu. Click Browse in Company Data File to choose the file to be scanned. Decide on the kind of scan you wish to perform.

Why is Sage 50 Unable to Open Company File Error Windows 10?

Reasons for Sage 50 being unable to open company file error on Windows 10 include:

1. File corruption or damage.
2. Insufficient permissions.
3. Antivirus interference.
4. Compatibility issues.
5. Incorrect installation.
6. Outdated drivers.
7. Network problems.
8. Limited disk space.

How to Fix the Sage 50 Unable to Open Company File Error 2021?

1. Check file integrity.
2. Disable antivirus temporarily.
3. Ensure stable network connections.
4. Run Sage 50 as administrator.
5. Update Sage 50 to the latest version.
6. Repair installation.
7. Verify user permissions.

About The Author

Picture of Editorial Team

Editorial Team

At QAsolved, we are a team of skilled professionals dedicated to delivering unparalleled accounting and bookkeeping services. With backgrounds in finance and technology, our collaborative efforts focus on providing practical solutions and guidance. Our services are tailored for a range of businesses, covering advisory, CFO services, bookkeeping, and financial systems consulting. QAsolved is an award-winning consulting firm and Intuit’s #1 QuickBooks Reseller Partner. We offer comprehensive QuickBooks services, including consulting, integration, migration, maintenance, data conversion, training, and support, among other services. Over the years, we have assisted over 30K customers across various industries with their Intuit products.

Recent Articles

Report An Issue?

We are here to help

Request A Free Consultation