2187 Error File Text (Structured) Files with the extension .err are often Error files used to assist with troubleshooting. They can be generated by a range of software and may not have a clear and consistent structure between different software applications. Please contact the PRONOM team if you have a specific type of .err file that can be identified accurately by signature. 216 The Canadian Centre for Architecture / The Canadian Centre for Architecture 04 Sep 2020 04 Sep 2020 fmt/1369 PUID err File extension