F03 File Extension

What is F03 file?

F03 is a file extension commonly associated with Fortran Source Code Format files. F03 file format is compatible with software that can be installed on Windows system platform. F03 file belongs to the Developer Files category just like 1205 other filename extensions listed in our database. The software recommended for managing F03 files is Lahey Fortran. On the official website of Lahey Computer Systems, Inc. developer not only will you find detailed information about theLahey Fortran software, but also about F03 and other supported file formats.

Programs which support F03 file extension

Below is a table that list programs that support F03 files. F03 files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Updated: 08/31/2020

How to open file with F03 extension?

Problems with accessing F03 may be due to various reasons. On the bright side, the most encountered issues pertaining to Fortran Source Code Format 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 Lahey Fortran

The main and most frequent cause precluding users form opening F03 files is that no program that can handle F03 files is installed on user’s system. The solution to this problem is very simple. Download Lahey Fortran and install it on your device. The full list of programs grouped by operating systems can be found above. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Lahey Fortran website and download the installer.

Step 2. Update Lahey Fortran to the latest version

If the problems with opening F03 files still occur even after installing Lahey Fortran, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Lahey Fortran is available. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. The reason that Lahey Fortran cannot handle files with F03 may be that the software is outdated. The most recent version of Lahey Fortran is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate Fortran Source Code Format files with Lahey Fortran

If you have the latest version of Lahey Fortran installed and the problem persists, select it as the default program to be used to manage F03 on your device. The method is quite simple and varies little across operating systems.

The procedure to change the default program in Windows

• Right-click the F03 file and choose Open with option
• Click Choose another app and then select More apps option
• The last step is to select Look for another app on this PC option supply the directory path to the folder where Lahey Fortran is installed. Now all that is left is to confirm your choice by selecting Always use this app to open F03 files and clicking OK.

The procedure to change the default program in Mac OS

• Right-click the F03 file and select Information
• Find the Open with option – click the title if its hidden
• 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 F03 extension. By clicking Continue you confirm your selection.

Step 4. Ensure that the F03 file is complete and free of errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper F03 file. It is probable that the file is corrupted and thus cannot be accessed.

1. Check the F03 file for viruses or malware

If the file is infected, the malware that resides in the F03 file hinders attempts to open it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. If the F03 file is indeed infected follow the instructions below.

2. Verify that the F03 file’s structure is intact

Did you receive the F03 file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the F03 file has been downloaded from the internet only partially, try to redownload it.

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. Switch to an account that has required privileges and try opening the Fortran Source Code Format file again.

4. Check whether your system can handle Lahey Fortran

If the system is under havy load, it may not be able to handle the program that you use to open files with F03 extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Fortran Source Code Format files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle F03 files.

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