How to Fix tquery.dll Missing Error – Step by Step

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How to Fix tquery.dll Missing Error (Solved)

How to Fix tquery.dll Missing Error (Solved)

What is tquery.dll?

tquery.dll is a Dynamic Link Library (DLL) file that is associated with Oracle’s ODBC driver for SQL*Plus a powerful command-line tool used to develop test and debug PL/SQL code in the Oracle Database environment. This DLL file allows applications to access functions and variables defined in the SQL*Plus program.

Why is tquery.dll missing?

There are several reasons why the tquery.dll might be missing on your Windows system:

  • Malware Infection: Malicious software can corrupt or delete essential system files including DLLs.
  • Accidental Deletion: You or another user may have accidentally deleted the tquery.dll file while cleaning up your system.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

The tquery.dll file might be a part of Microsoft’s Visual C++ Redistributable package. If the file is missing reinstalling this package can help resolve the issue.

  1. Download the latest version of Visual C++ Redistributable from the following link: Microsoft’s Visual C++ Download Page
  2. Run the downloaded installer and follow the on-screen instructions to complete the installation.

Method 2: Run SFC /scannow command

Running the System File Checker (SFC) can help restore missing or corrupted system files including DLLs. Here’s how:

  1. Press Windows key + X and select “Command Prompt (Admin)” from the menu.
  2. Type the following command and press Enter:
    sfc /scannow
  3. Wait for the scan to complete. The system may restart automatically to finish the repair process.

Method 3: Update System Drivers

Outdated or corrupted drivers can cause various issues including missing DLL files. Updating your system drivers might help resolve this problem:

  1. Press Windows key + X and select “Device Manager” from the menu.
  2. Locate the device for which you want to update the driver. Right-click on it and select “Update Driver”.
  3. Choose “Search automatically for updated driver software” and follow the on-screen instructions to complete the update process.

Conclusion

The tquery.dll missing error can cause issues with Oracle’s ODBC driver for SQL*Plus. This guide provides three methods to help you resolve this issue: reinstalling Visual C++ Redistributable running the SFC /scannow command and updating system drivers.

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