Save to a previous Uipath release

[Sax72 (Andrea)]

Hi All, I’m using UiPath Community Edition, and I recently updated at the version 2019.9.2
Now my customer would like to do a PoC with Uipath and I installed a trial lic 2018.4.3, (received from uipath) unfortunately, all the projects that I’ve done (with the newer version), can not be opened due to error detecting projects version.
Is there any kind of way to save with a previous version or a workaround to the overpass to skip this problem
following an example of the detailed error
"
Cannot open item: UiPath.Studio.Contracts.RecoverableException: The project ‘C:\Users\Andrea\Documents\UiPath\Trello\project.json’ could not be opened: Error detecting project version. —> System.NotSupportedException: Error detecting project version
at UiPath.Project.ProjectData.WorkflowDataUpgrade.GetLatestProjectData(String projectContent, Dictionary`2 availablePackages) in D:\a\1\s\Common\UiPath.Project\ProjectData\WorkflowDataUpgrade.cs:line 61
at UiPath.Project.WorkflowProjectRepository.<>c__DisplayClass10_0.<b__0>d.MoveNext() in D:\a\1\s\Common\UiPath.Project\WorkflowProjectRepository.cs:line 135
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at UiPath.Project.WorkflowProjectRepository.d__10.MoveNext() in D:\a\1\s\Common\UiPath.Project\WorkflowProjectRepository.cs:line 131
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at UiPath.Studio.Plugin.Workflow.Project.WorkflowProjectModelFactory.d__42.MoveNext() in D:\a\1\s\Studio\UiPath.Studio.Plugin.Workflow\Project\WorkflowProjectModelFactory.cs:line 284
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

…
"

Thanks
Sax

[ppr (Peter Preuss)]

@Sax72
Create an empty Project in 2018 and compair the project.json with one project.json from one 2019 Project.

Pay Attention on e.g. Schema Version and dependencies.

Downgrading a Project would Start with this actions and adoptions and at least manually you can Convert the projects

[lakshman (Ganta lakshman)]

@Sax72

You are getting this error because the activities you used in latest version may not be available in older version.

As @ppr said, you have to compare packages in both versions and then check it.

[Natapong (Natapong Raojutitam)]

Hi​ @Sax72

For​ more​ information​ and​ solution​ , you​ can​ see​ as​ below​:

UiPath Community Edition with On-Premise Orchestrator Server

Hi @JasonGoble, You need to know that Community Edition is constantly growing and each new update is forced for all users. Sometimes it happens that new version of something (ex. package, library, function) is behaving in wrong manner. This is the reason why in Enterprise Edition we are focused on applying everything what has been fully tested by our devs and of course passed the Community Edition as well. Based on this I would say that in case you have EE (Enterprise Edition) you should have u…

[Sax72 (Andrea)]

Hi Natapong I tried to open the Xaml file instead of the json project as suggested by Pablito but I get the same error.
But if I create a new version of the project 2018 and import the xmal file seems to work.

Thanks
Sax