How to Fix “Assertion Failed” Issue in Sage 50

Last updated: March 8th, 2024

Fixing the "Assertion Failed" Error in Sage 50

Are you unable to open Sage 50 on your workstation due to an error message that says "Assertion Failed, Abort, Retry, Ignore"? Another variation of this error message can be:

"Assertion Failed: System.Reflection.TargetException: Non-Static method requires a target" when running standard Intelligence Reports.

Sage 50 Assertion Failed Issue

This error can be frustrating and prevent you from accessing your accounting data in Sage 50. However, there are several troubleshooting steps you can take to resolve this issue. Before proceeding with any advanced solutions, it's crucial to create a backup of your Sage 50 data files to avoid any potential data loss.

Causes of the "Assertion Failed" Error

The "Assertion Failed" error in Sage 50 can occur due to various reasons, such as:

  1. Mismatch in Sage 50 versions across the network
  2. Damaged or corrupted software installation
  3. USB media used for restoring the backup
  4. Workstation not on the same service release as the server
  5. Damaged installation files on the workstation

These issues can lead to the "Assertion Failed" error message when attempting to open Sage 50 or run certain features like Intelligence Reports.

Troubleshooting Solutions

Here are some step-by-step solutions to help you resolve the "Assertion Failed" error in Sage 50:

Solution 1: Install the Latest Service Release

  1. When the error message appears, click 'Ignore' and close Sage 50.
  2. An installation prompt will appear on your screen after closing Sage 50. (Sage 50 error "1628 Failed To Complete Installation")
  3. Click 'Yes' and follow the on-screen instructions to install the latest service release update.
  4. Open Sage 50 to check if the issue has been resolved.

Solution 2: Repair Corrupted or Damaged Path File (Single Workstation)

If the error occurs on a single computer or workstation, follow these steps:

  1. Close Sage 50 on the affected workstation.
  2. Run the Repair Tool on Sage 50. If you're unsure how to run it, consult the Sage 50 documentation or seek assistance from a qualified technician.
  3. Check for the latest Sage Service Release and install it.
  4. Open Sage 50 and verify if the error has been resolved.
  5. If the error persists, proceed to the next solution.

Solution 3: Restore Backup from Local Drive

  1. Locate the .ptb backup file and move it from the USB drive to the local drive.
  2. Restore the backup on the local drive.
  3. Open Sage 50 and check if the "Assertion Failed" error has been resolved.

Frequently Asked Questions (FAQ)

Q: What should I do if none of the above solutions work?

A: If you've tried all the troubleshooting steps and the "Assertion Failed" error persists, it's recommended to seek assistance from a qualified Sage 50 technician or consultant. They can provide further guidance and help resolve any underlying issues.

Q: Can I continue using Sage 50 with the "Assertion Failed" error?

A: It's not advisable to continue using Sage 50 when encountering the "Assertion Failed" error. This error indicates a problem with the software or data files, and ignoring it may lead to data corruption or loss. It's best to address the issue before resuming your work in Sage 50.

Q: How often should I create backups of my Sage 50 data?

A: It's crucial to regularly create backups of your Sage 50 data to protect against data loss due to errors, system failures, or other unforeseen circumstances. The frequency of backups depends on the volume and importance of your data, but a general recommendation is to perform daily backups and store them securely on an external device or cloud storage service.

Q: Can I prevent the "Assertion Failed" error from occurring in the future?

A: While it's not always possible to completely prevent the "Assertion Failed" error, you can take certain precautions to minimize the risk:

  • Ensure that all workstations and servers are running the same version and service release of Sage 50.
  • Regularly install the latest updates and patches provided by Sage.
  • Avoid using USB media for storing or restoring backups. Instead, use a reliable network storage or cloud backup solution.
  • Perform routine maintenance tasks, such as database optimization and file verification, to keep your Sage 50 data in good health.

By following these best practices and addressing any issues promptly, you can reduce the likelihood of encountering the "Assertion Failed" error in Sage 50. Protection Status


Toll Free: 800-942-0215 user