File extension FAS
| File type | AutoCAD Fast-load Auto LISP Format |
| Developer | Autodesk |
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What is a FAS file?
File with a .FAS extension contains complex code of a script written in the AutoLISP programming language, usually serving as an additional tool or a macro. Compiling of the source files is usually performed with IDE Visual LISP.
FAS files are used to extend the AutoCAD software – automatizing common processes and adding new functionalities. IDE used for compiling of such files is often added to the AutoCAD software.
Program(s) that can open the .FAS file
Windows
How to open FAS files
If you cannot open the FAS file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports FAS among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the FAS file can be found in the table. Now just download and install the appropriate application.
Possible problems with the FAS format files
The inability to open and operate the FAS file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the AutoCAD Fast-load Auto LISP Format file. Below is a list of possible problems.
- Corruption of a FAS file which is being opened
- Incorrect links to the FAS file in registry entries.
- Accidental deletion of the description of the FAS from the Windows registry
- Incomplete installation of an application that supports the FAS format
- The FAS file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the FAS file.
- Drivers of equipment used by the computer to open a FAS file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the FAS file should operate with your programs without any problem. If the problem with the FAS file has not been solved, it may be due to the fact that in this case there is also another rare problem with the FAS file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .a6p | Adobe Authorware Application Format |
| .action | Mac OS X Automator Action Format |
| .actm | Autodesk AutoCAD Action Macro Format |
| .ahk | AutoHotkey Script Format |
| .air | Adobe AIR Rich Internet Applications |
| .apk | Google Android Package Format |
| .app | MAC Application Package Or Core System Service Format |
| .applescript | AppleScript Script Format |
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.FAS) you have two ways to do it. The first and the easiest one is to right-click on the selected FAS file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the FAS file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. FAS) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.