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ER1 file format description

ER1 file format

We made this page to help you understand how to work with ER1 files. Here, you can find info on software that can handle these files. It includes simple programs for opening and converting them.

Learn about the ER1 file and its functions here!

We also explain how to convert them into other types. It's simple and hassle-free. For opening or changing ER1 files, this page offers all the tools you need.

#1 CA ERwin 4.x Diagram

The ER1 file is categorized under Document. It is associated with CA ERwin Data Modeler, serving as a CA ERwin 4.x Diagram. CA ERwin Data Modeler (ERwin) is a software tool for data modeling (data requirements analysis, database design etc) of custom developed information systems, including databases of transactional systems and data marts. Visit the website of CA ERwin Data Modeler for a detailed description of the ER1 format.

Application:CA ERwin Data Modeler
Category:Document files
Mime-type:application/octet-stream
Magic:- / -
Aliases:-

CA ERwin 4.x Diagram related extensions

  • mscx MuseScore Music Score
  • sprz Sprintometer Document
  • ao ActionOutline Outline
  • tse Light Map Maker Scene

Did someone accidentally misspell the ER1 filename?

The ER1 filename extension may be misspelled. We compiled a list of similar file extensions to help you find errors.

Filename extensions similar to ER1:

Windows can't open your ER1 file?

When you try to open a file by double-clicking it, Windows looks at the file's name to figure out what to do. If Windows doesn't know the file type, it'll ask you to choose an app to open this ER1 file.

To set the ER1 file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. In the Default apps section, you will find various categories. They include Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate. For example, choose Photos for image files, or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the app you want is not listed, click on More apps to see more options. Or, click on Look for an app in the Microsoft Store to search for apps.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set ER1 file association. Many apps can open files. They don't need a specific file association to be set.

Handle ER1 files with care

Exercise caution when handling ER1 files from unknown sources. Files from certain sources can threaten your computer's security. They might contain malware, viruses, or harmful software. To minimize risks, avoid downloading or opening unfamiliar ER1 files. Use trusted antivirus software to scan files from unknown sources before opening.

If you find the information on this ER1 page useful, please feel free to link to this page.

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