999 File Extension

What is 999 file?

Full format name of files that use 999 extension is Sage Backup. 999 files are supported by software applications available for devices running Windows. Files with 999 extension are categorized as Archive Files files. The Archive Files subset comprises 619 various file formats. The software recommended for managing 999 files is Sage Accpac Extended Enterprise Suite. On the official website of The Sage Group plc developer not only will you find detailed information about theSage Accpac Extended Enterprise Suite software, but also about 999 and other supported file formats.

Programs which support 999 file extension

The following listing features 999-compatible programs. Files with 999 extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

How to open file with 999 extension?

Being unable to open files with 999 extension can be have various origins. On the bright side, the most encountered issues pertaining to Sage Backup files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Get the Sage Accpac Extended Enterprise Suite

The main and most frequent cause precluding users form opening 999 files is that no program that can handle 999 files is installed on user’s system. The solution is straightforward, just download and install Sage Accpac Extended Enterprise Suite. Above you will find a complete listing of programs that support 999 files, classified according to system platforms for which they are available. If you want to download Sage Accpac Extended Enterprise Suite installer in the most secured manner, we suggest you visit The Sage Group plc website and download from their official repositories.

Step 2. Verify the you have the latest version of Sage Accpac Extended Enterprise Suite

If you already have Sage Accpac Extended Enterprise Suite installed on your systems and 999 files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. If you have an older version of Sage Accpac Extended Enterprise Suite installed, it may not support 999 format. The most recent version of Sage Accpac Extended Enterprise Suite is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate Sage Backup files with Sage Accpac Extended Enterprise Suite

If the issue has not been solved in the previous step, you should associate 999 files with latest version of Sage Accpac Extended Enterprise Suite you have installed on your device. The method is quite simple and varies little across operating systems.

Change the default application in Windows

• Right-click the 999 file and choose Open with option
• Next, select the Choose another app option and then using More apps open the list of available applications
• The last step is to select Look for another app on this PC option supply the directory path to the folder where Sage Accpac Extended Enterprise Suite is installed. Now all that is left is to confirm your choice by selecting Always use this app to open 999 files and clicking OK.

Change the default application in Mac OS

• From the drop-down menu, accessed by clicking the file with 999 extension, select Information
• Proceed to the Open with section. If its closed, click the title to access available options
• Select the appropriate software and save your settings by clicking Change all
• A message window should appear informing that This change will be applied to all files with 999 extension. By clicking Continue you confirm your selection.

Step 4. Check the 999 for errors

Should the problem still occur after following steps 1-3, check if the 999 file is valid. It is probable that the file is corrupted and thus cannot be accessed.

1. Verify that the 999 in question is not infected with a computer virus

If the file is infected, the malware that resides in the 999 file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the 999 file is indeed infected follow the instructions below.

2. Ensure the file with 999 extension is complete and error-free

If the 999 file was sent to you by someone else, ask this person to resend the file to you. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. When downloading the file with 999 extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

Some files require elevated access rights to open them. Log out of your current account and log in to an account with sufficient access privileges. Then open the Sage Backup file.

4. Make sure that the system has sufficient resources to run Sage Accpac Extended Enterprise Suite

If the system is under havy load, it may not be able to handle the program that you use to open files with 999 extension. In this case close the other applications.

5. Check if you have the latest updates to the operating system and drivers

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Sage Backup files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle 999 files.

Do you want to help?

If you have additional information about the 999 file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on 999 file.