Varieties of O1 Files

Leading O1 Type

.O1

File Name:	.o1
Type:	Object File For GO321v1 Platform

A O1 file is a file related to Free Pascal, a compiler for the Pascal and Object Pascal programming languages. It is an object file for the GO321v1 Platform.

Company:	Open Source
Group:	Data Files
Subkey:	HKEY_CLASSES_ROOT\.o1

Software Programs That Open The Object File For GO321v1 Platform:

Free Pascal by Open Source

Windows

Mac

Linux

OS/2

	FreeBSD
	NetBSD
	SunOS

BeOS

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Sources of O1 Problems

Troubles Opening O1 Files

Free Pascal Removed

When trying to open your O1 file, you get the error "Can't Open O1 File Type". If so, it typically means that you don't have Free Pascal installed for %%os%%. Your operating system cannot associate your O1 with Free Pascal, so double-clicking the file won't work.

Tip: When you have another program installed that you know will open your O1, you can select it from the other programs listed (see "Show Apps").

Outdated Free Pascal

In some cases, you might have a newer (or older) version of a Object File For GO321v1 Platform file that is unsupported by your installed application version. Installing the latest version of Free Pascal from Open Source is recommended. This problem is predominately due to having a Object File For GO321v1 Platform file version that was created by a newer version of Free Pascal than what you have installed on your PC.

Tip: Investigate your O1 file by right-clicking and selecting "Properties" to find clues on what version you need.

Summary: In either case, the majority of problems opening O1 files are related to not having the correct software application installed on your computer.

Associated Difficulties Loading O1 Files

Assuming you have the right Free Pascal version installed, other problems can prevent you from opening O1 files. There can be external issues inside of %%os%% that are causing these errors when opening O1s. These other problems include (listed in order from most to least common):

• O1 file references in the Windows Registry are broken
• Accidental deletion of the description of the O1 file in the Windows registry
• Incomplete or bad installation of a software application associated with the O1 format
• O1 file corruption
• Past or present virus infection has affected your O1
• Drivers associated with O1 software need to be updated
• Windows has inadequate resources to open your Object File For GO321v1 Platform file