.ER1 File Extension

Developer:
Computer Associates
File Type:
ERWin Entity Relationship Diagram
Popularity:

Having trouble opening .er1 extension? Don't panic! This page explains what er1 files are as well as suggests programs you may use to open er1 files. You can download these programs through this page.

What is a ER1 file?

Er1 file extension has ERWin Entity Relationship Diagram file type, developed by Computer Associates, which is associated with the "data files" category.

To learn how you can open the given file, read the information below.

er1 file icon
Developer:
Computer Associates
File Type:
ERWin Entity Relationship Diagram
Category:
Data Files
Format:
N/A

How to open ER1 file?

Double click the er1 file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .er1 extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the er1 extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".
4.461.230 downloads

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the er1 file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open ER1 files

  • Windows Windows
    • CA ERWin Data Modeler CA ERWin Data Modeler

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the er1 file as well. Download Universal File Viewer for your OS.

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