Opening CUP Files

The CUP file type is primarily associated with SeeYou.

CUP	File extension: CUP
	File type:	data file

What is a CUP file?

CUP files mostly belong to SeeYou. CUP files come in several forms, depending on their use. For example, one common type is a waypoint file used in flight navigation. These files store soaring flight turnpoint data that can be imported into SeeYou for route planning.
Other uses include:

• HMS configuration files: Used in FIELDGATE systems as part of CODESYS projects.
• Firmware files: Employed for programming Atmel AVR microcontrollers, often linked with CUP2 and PICkit 2 Programmer tools.
• ZIP archives: Some CUP files are ZIP archives (created with 7-Zip) containing software update packages. More details can be found here.

FilExt.com tip: For the flight waypoint files specifically, more information is available here. Each use case requires the recommended application to view or edit its contents.

How to open a CUP file

You need a suitable software like SeeYou to open a CUP file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CUP file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CUP file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CUP Text Viewer

Choose your .cup file to analyze

or drag and drop it here

Online File Viewer

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CUP file format:

If you know the file format, you can also find out how to open or edit the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. If there are problems opening a file, you must first determine the file format used. Below you will find our evaluation of the CUP files:

CUP is seldom used as a file extension and includes various formats for various programs. However, the following two file formats are common:

• 30% of all CUP files use the same file format, which can be identified by the letters "name,code,country,lat,lon,elev,style,rwdir,rwlen," at the beginning. These files are text files and can therefore be read using a text editor. A typical file size is 30 KB. The file type is a fairly new file format. The following keywords are characteristic: userdata, pics and name,code,country,lat,lon,elev,style,rwdir,rwlen,freq,desc.
• 10% of all CUP files use the same file format, which can be identified by the letters "47 04" at the beginning. These files are binary files, so they do not contain text, but only cryptic characters. The file size is in the range of 900 bytes to 370 KB. Certain words are almost always found in the files, such as SC1x5 and WEB-PLC. Examples of file names are config.cup.

All other CUP files (60%) have no consistent format, such as CUP. Sometimes used for patch, mjparser, germany or update. Just click the "Choose your .cup file to analyze" button on this page to find out what your CUP file is.