I get these error messages when attempting to open an assembly file. Its not a large file, has no imported parts and only a few configurations to show assembly steps. The 'access error' shows when highlighting sldasm file, the 'unexpected file format' shows when trying to open the file. Any ideas how to solve/open when there is this problem?
The file might have got corrupted. Check if you can open the individual parts. Also try opening the assembly on a different machine or share here (if possible). If you still getting issues, send the file to your VAR or SW team to fix (they have some special tool to fix corrupted files). Last check if you can recreate the assembly.