Error when updating UMARE from v1.5.6591 to v2.0.4

[Alcodowi]

We have a transformation that use c# and after the update we have this error :

The server encountered an unexpected error:
"Error (CS0246, Line 5, Col 7): Le type ou le nom d'espace de noms 'Lithnet' est introuvable (une directive using ou une référence d'assembly est-elle manquante ?)

From french to english : "The type or namespace name 'Lithnet' was not found (is a using directive or assembly reference missing?"

Our c# script start with :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using Lithnet.Transforms;
using Microsoft.MetadirectoryServices;

public static class CSExtension
{
public static IList Transform(IList obj)
{
...

Line 5 is "using Lithnet.Transforms;" , if we roll back to the old version everything works fine.

[ryannewington]

Do you get this error when testing the transform in the umare editor, or only when running in the sync engine.

[Alcodowi]

Hello Ryan,
Thanks for the reply,

We didn't test UMARE in the editor but directly with the sync engine.

I can give you more context on the subject because we have done more things on this infra :

MIMSync -> MIMSYNC SP2 KB4512924
MIMSYNC SP2 KB4512924 -> KB5018333
Windows Server 2012 R2 -> Windows Server 2019 (In-place upgrade)
SQL Server 2016 SP3 -> SQL Server 2022 -> SQL Server 2022 CU 15 (Not officialy supported)
UMARE v1.5.6591-> v2.0.4

We have installed all prerequisites required for MIM Sync SP2 (.netframework, ...)

If necessary i can give you more info from the script in private.

Thanks again for the answer,
Best Regards,

[ryannewington]

Sorry for the late response.

Can you use the transform tester inside the UMARE editor and see if the issue happens there?

Can you share the contents of the extensions folder dir C:\Program Files\Microsoft Forefront Identity Manager\2010\Synchronization Service\Extensions