Symptoms
While importing project with FluentBooks, you may get the following error:
ERROR Project "Test Project" import error (Exception) TargetInvocationException: Exception has been thrown by the target of an invocation. at FluentPro.OfficeInterop.Helpers.COMAction.CallWithRetry(Func`1 func, Int32 retryCount, Int32 retryDelay) at FluentPro.OfficeInterop.MSProject.MSProjectApplication.FileOpenEx(String projectName, BooleanopenAsReadOnly,PjPoolOpenpoolOpen) at FluentPro.FluentBooks.WizardControllers.DownloadProjectsToFppFilesWizardController.DownloadProjectToFppFile(ProjectInfo project, String fppFilePath, PSDataProvider provider, ElementDetail elementDetail) at FluentPro.FluentBooks.WizardControllers.DownloadProjectsToFppFilesWizardController.LoadProjectsData(AuthenticationType auth, String url, String login, String password) (Exception) COMException: The argument value is not valid
Cause
This issue may indicate to corrupted local cache in Project Pro.
Workaround
1. Clean Cache from Project Pro. To do that, go to File → Options → Save → Clean Up Cache.
2. We would also recommend cleaning the following folder before starting the migration.
%Appdata%\Microsoft\MS Project\16\Cache