Occasionally I run into the issue where the modeler fails to open a project on my local desktop that I have been working with for several days. A reboot doesn't change the behavior. Removing the .mendix-cache folder seems to have no impact. If I remove the whole project from my local machine this tends to solve the problem. The stack trace of the error that occurs is below. Anyone see this before or have a solution other than removing my local copy? System.UnauthorizedAccessException: Access to the path 'C:\Mendix\myproject-Main\.mendix-cache\base_data' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) at Mendix.Modeler.Utility.FileSystem.CreateEmptyFile(String filePath) in C:\jenkins-ci\workspace\AppStudio3.0-Build\modeler\Mendix.Modeler.Utility\FileSystem.cs:line 188 at Mendix.Modeler.Storage.Database.Create(IFileSystem fileSystem, String filePath, IStorageUnit rootUnit, IProgressInfo info) in C:\jenkins-ci\workspace\AppStudio3.0-Build\modeler\Mendix.Modeler.Storage\Database.cs:line 172 at Mendix.Modeler.Operations.ProjectSaver.SaveProject(IProject project, String filePath, IProgressInfo info) in C:\jenkins-ci\workspace\AppStudio3.0-Build\modeler\Mendix.Modeler.Core\Operations\ProjectSaver.cs:line 33