What to do When JAM Files Won’t Open

Why won’t your JAM file open? You’ve tried double-clicking it, but it doesn’t come up, or you see an error message. So what do you do? This is a common issue with various file extensions because many extensions can be opened by multiple programs, and many programs can open a variety of extensions. It sounds confusing, but it's a lot easier to understand than you might think!

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Which program should you use?

Your computer may be trying to use the wrong program to open the JAM file, or it may not have a program installed that can open the file. There are a few different programs you can use to open JAM files, including Unknown Apple II File, Joaquim-Andrew-Mats Message Base Proposal, and E-mail software. Try downloading one or more of these from the manufacturer’s website to open your JAM file.

What type of file is it?

The file type is the key to opening JAM files. JAM files are usually considered CAD Files. You may already have a program on your computer that can open this type of file.

If the file type is unknown, you can find it in the file properties by following the steps below.

Computer Files
Windows:
  1. Right-click the file and click “Properties”.
  2. Look under “Type of File” for the file type.
Mac:
  1. Right-click the file and click “Properties".
  2. Look under “Kind” for the file type.

Who developed the software?

If you can’t find the right program to open your JAM file, a software developer might be able to help you. Contact the developer of one of the most common programs for JAM files from the list below.

Software Developer
Unknown Apple II File is developed by found on Golden Orchard Apple II CD Rom
Joaquim-Andrew-Mats Message Base Proposal is developed by Windows Programmer
E-mail is developed by Microsoft Developer
FTN Software Jam Messagebase is developed by Microsoft Programmer
JamTracker Music Module is developed by Unknown
Image Microprose is developed by Microsoft Developer

Why not try a universal file viewer?

A universal file viewer is a program that can open files with a wide range of extensions, depending on the file format. When you have JAM files you can’t open, a universal file viewer like File Magic (Download) can open it for you. Just remember that some files aren’t compatible with this type of program, and they will only open in binary format.


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1File types that are unsupported can be opened in binary format.

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