Types of RXN Files

Primary RXN File Association

.RXN

File Format:	.rxn
File Type:	MDL Molfile Reaction Format

Created by:	MDL Information Systems Inc.
File Category:	Uncommon Files
Registry Key:	HKEY_CLASSES_ROOT\.rxn

Software Programs That Open The MDL Molfile Reaction Format:

MDL Molfile Reaction Format by MDL Information Systems Inc.

Windows

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Troubleshooting Problems Opening RXN Files

Common Problems Opening RXN Files

MDL Molfile Reaction Format is Not Installed

When you double-click your RXN file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If this is the case, it's usually due to the fact that you do not have MDL Molfile Reaction Format for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.

Tip: If you know of another program that can open your RXN file, you can try opening it by selecting the application from the programs listed.

Wrong Version of MDL Molfile Reaction Format is Installed

In some cases, you might have a newer (or older) version of a MDL Molfile Reaction Format file that is unsupported by your installed application version. If you do not have the proper version MDL Molfile Reaction Format (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.

Tip: Sometimes you can get a clue about the version of RXN file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).

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

Other Causes of RXN File Opening Problems

Although you might already have MDL Molfile Reaction Format or another RXN-associated software installed on your computer, you can still encounter problems opening MDL Molfile Reaction Format files. If you are still having problems opening RXN files, there may be other issues that are preventing you from opening these files. These other problems include (listed in order from most to least common):

• Invalid RXN file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Accidental deletion of the description of the RXN file in the Windows registry
• Incomplete or bad installation of a software application associated with the RXN format
• Your RXN file is corrupted (issues with your MDL Molfile Reaction Format file itself)
• Your RXN is infected with malware
• Device drivers of the hardware associated with your RXN file are corrupt or out-of-date
• Your computer does not have the adequate system resources to open the MDL Molfile Reaction Format format