TAG file icon

TAG File Extension

DataFlex Query Tag

What is TAG file?

TAG is a file format associated with DataFlex Technology. TAG is a text file that stores data entries defined in associated DAT files. TAG files (as well as FD files) are named the same as related DAT files. TAG files should not be edited manually.


DataFlex is a technology for developing various applications using one framework-based platform. The tool allows users to develop multiplatform applications using the intuitive interface. Integration with database systems is conducted using built-in tools, some of which use TAG files. Using DataFlex developers can create desktop, web, or mobile applications for Windows-based systems.

Programs which support TAG file extension

The following listing features TAG-compatible programs. TAG files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Programs that support TAG file

Windows Windows

Updated: 03/01/2024

How to open file with TAG extension?

There can be multiple causes why you have problems with opening TAG files on given system. On the bright side, the most encountered issues pertaining to DataFlex Query Tag files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the DataFlex

Install software to open TAG file The most common reason for such problems is the lack of proper applications that supports TAG files installed on the system. The solution to this problem is very simple. Download DataFlex and install it on your device. Above you will find a complete listing of programs that support TAG files, classified according to system platforms for which they are available. The safest method of downloading DataFlex installed is by going to developer’s website (The Database Managers, Inc.) and downloading the software using provided links.

Step 2. Check the version of DataFlex and update if needed

Update software that support file extension TAGYou still cannot access TAG files although DataFlex is installed on your system? Make sure that the software is up to date. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that DataFlex cannot handle files with TAG may be that the software is outdated. The latest version of DataFlex should support all file formats that where compatible with older versions of the software.

Step 3. Associate DataFlex Query Tag files with DataFlex

If you have the latest version of DataFlex installed and the problem persists, select it as the default program to be used to manage TAG on your device. The method is quite simple and varies little across operating systems.

Associate software with TAG file on Windows

Selecting the first-choice application in Windows

  • Choose the Open with entry from the file menu accessed by right-mouse clicking on the TAG file
  • Select Choose another app → More apps
  • Finally select Look for another app on this PC, point to the folder where DataFlex is installed, check the Always use this app to open TAG files box and conform your selection by clicking OK button
Associate software with TAG file on Mac

Selecting the first-choice application in Mac OS

  • By clicking right mouse button on the selected TAG file open the file menu and choose Information
  • Proceed to the Open with section. If its closed, click the title to access available options
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • Finally, a This change will be applied to all files with TAG extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Verify that the TAG is not faulty

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

Check TAG file for viruses
1. Check the TAG file for viruses or malware

If the file is infected, the malware that resides in the TAG 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 TAG file is indeed infected follow the instructions below.

2. Check whether the file is corrupted or damaged

If you obtained the problematic TAG file from a third party, ask them to supply you with another copy. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. It could happen the the download process of file with TAG extension was interrupted and the file data is defective. Download the file again from the same source.

3. Check if the user that you are logged as has administrative privileges.

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the DataFlex Query Tag file.

4. Check whether your system can handle DataFlex

The operating systems may note enough free resources to run the application that support TAG files. Close all running programs and try opening the TAG file.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with DataFlex Query Tag files. It is possible that one of the available system or driver updates may solve the problems with TAG files affecting older versions of given software.

Do you want to help?

If you have additional information about the TAG 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 TAG file.

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