File Extension Library

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.ER1 File Extension

  • Developer by: Computer Associates
  • Category: Data Files

What are .ER1 files and how to open them?

Can't open .ER1 file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .ER1 file.

What is a .ER1 file extension?

.ER1 file extension is created by Computer Associates. .ER1 has been classified as Data Files.

.ER1 is ERWin Entity Relationship Diagram

Entity relationship diagram created by ERWin, a data modeling program published by Computer Associates (CA); used for visualizing data structures and managing data complexities.

CA ERWin Data Modeler was previous known as AllFusion ERwin Data Modeler.

How to fix problems with .ER1 files

  1. You need to update the application that you normally use to open .ER1 files. Only the latest version of the software supports the current .ER1 file format
  2. You need to check the .ER1 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)
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