More often than not, CATIA V5 users save their models in the correct release. The release number is often defined after the version number, for example CATIA version 5, realease number 20 would be known as CATIA V5R20.
It is important that users working in collaboration with customers, suppliers, and other users ensure that all models are saved in the same version and release of CATIA. CATIA is only backwards compatible, meaning that if the user saves a file in CATIA V5R20, they would no longer be able to open the models in an earlier release such as CATIA V5R18. The naming format changes with later releases of CATIA V5 which are compatible with ENOVIA V6. These release numbers are defined in a format whereby the year of release is identified; e.g. CATIA V5-6R2015. In this example, the version of CATIA is still V5 and the release can be ‘nicknamed’ R25.
The below image shows a typical error message obtained when a user tries to open a CATIA V5 file in a lower release than it was last saved in:
In order to determine which release of CATIA V5 was last saved in:
Find the .CATPart file (smaller in size the better) and open it in a notepad:
Ensuring the mouse cursor is at the top line, perform a find (CRTL+F) and search for string “save”:
Upon pressing “Find Next”, find the line which states your release:
In the above example, this particular CATIA V5. CATPart file was last saved in CATIA V5-6R2018 (CATIA V5R28), thus can only be opened on this release or higher.