ER1 files contain ERWin Entity Relationship Diagrams. The ER1 specification was created by Computer Associates for the ERWin software. Files with the ER1 extension may be used by Windows programs. The...
ER1 files contain ERWin Entity Relationship Diagrams. The ER1 specification was created by Computer Associates for the ERWin software. Files with the ER1 extension may be used by Windows programs. The ER1 file format belongs to the Data Files category along with over one thousand other formats. CA ERWin Data Modeler is the most popular software supporting ER1 files.
To open an ER1 file, the application used to create it is required. Only the latest version supports the current format. ER1 files should also be checked for viruses before opening. On Windows, right-click on the ER1 file. Choose “Open with” and select the desired program. Check “Always use this app”. This associates ER1 files with the chosen program. On Mac, right-click the ER1 file and select “Open with”. Choose the program and check “Always Open With”. On Linux, right-click the file and choose “Open with” to select a program. On iPhone, tap the file and choose an app to open it. Alternatively, save the file then open it in the Files app. Long press the file then release to select a program.
The ER1 extension is primarily used by CA ERwin Data Modeler. This program enables visualizing complex data structures and managing data complexity. The ER1 file contains program data resources. To open, edit convert or print ER1 files, compatible software is needed. We provide information on software, editing instructions and conversion options for ER1 files. Our goal is simplifying use of this format.
CA ERwin Data Modeler