I cannot open a ZTG file. What should I do? Help!

Virtually anyone has encountered some problems with opening unknown files while working on a computer. It can be very frustrating. Yet such problems, not only with ZTG files, can be addressed in a standard way. Follow the steps below and we can guarantee that your problem with opening ZTG will be resolved!

ZTG File Extension

File
  • File type ZEMAX Table Glass
  • File developer ZEMAX Development Corporation
  • File category Misc Files
  • File popularity rating
    • Star
    • Star
Open

How to open ZTG file?

If given user account does not have necessary permissions to open files with ZTG extension, it is highly probable that no program that supports given files is installed on the users’ system. Below is a list of actions user should pursue in order to resolve most common problems.

Step 1. Download and install application that supports ZTG files

After the application has been installed, the system should automatically open ZTG files with given application. Below is the list of relevant programs along with operating systems they are available for:

Programs that support ZTG files

Windows programs
Windows

Step 2. Verify whether ZTG files are associated with appropriate software

It is possible that an application that supports ZTG files is not associated with such files. In such case, the program should by manually associated with ZTG files (right-click on the file icon → PropertiesGeneral Tab → In submenu "Open with" and click on "Change" button. System will display a list of suggested programs that support ZTG files. Choose the application by checking the box "Always use the selected application to open this kind of files". System will store this information in its registry and use it to open ZTG files with the selected program.

Changing ZTG file association in registry

File association for ZTG files can be edited manually by editing appropriate entry in Windows System Registry. However, it is discouraged as it may introduce errors to registry if not done properly and may even damage the system.

Step 3. Check ZTG file for other errors

  • ZTG file was not copied properly from storage medium.
  • Antivirus application prevents opening ZTG files. In that case it is recommended to exercise extreme caution and recover or delete infected ZTG file. It is also advised to scan the entire system for malicious software and viruses with antivirus software.
  • For ZTG files downloaded from the internet it is advised to check if the file has been downloaded completely and is not corrupted. If not, the file should be re-downloaded.

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