Error while running synchronization (after upgrading from 7.0.3 to 8.1)

Hi,

After upgrading the OneIM from 7.0.3 to 8.1 version, when AD sync run getting the following error.

ErrorMessages (2019-07-11 19:34:59.940) [2134003] Error executing synchronization.
[1777018] Error executing synchronization project (Active Directory Domain (DC=test,DC=com))'s workflow (Initial Synchronization).
[1777260] Unknown variable (CP_d1imloginaccount)!
   at StdioProcessor.StdioProcessor._Execute(Job job)
   at VI.Projector.JobComponent.ProjectorComponent.Activate(String task)
   at VI.Projector.JobComponent.ProjectorComponent._FullProjection()
   ---- Start of Inner Exception ----
   at VI.Projector.JobComponent.ProjectorComponent._FullProjection()
   at VI.Projector.Database.ProjectorExecutor.Project(ISession session, IProjectionConfiguration configuration, ProjectionOption options, ISystemObject adHocObject, CancellationToken cancellationToken)
   at VI.Projector.Projection.Extensions.Execute(IProjectorEngine engine, IProjectionConfiguration configuration, ProjectionOption options, ISystemObject adHocObject, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   ---- Start of Inner Exception ----
   at VI.Projector.Projection.ProjectorEngine.<ExecuteAsync>d__3.MoveNext()
   ---- Start of Inner Exception ----
   at VI.Projector.Projection.ProjectorEngine.<ExecuteAsync>d__3.MoveNext()
   at VI.Projector.Projection.ProjectionOptimizationHelper.SetupSystemAccessOptimizers(IProjectorShell shell, IProjectionConfiguration workflow, ProjectionMode projectionMode)
   at VI.Projector.SystemElement.GetUsedElements(SystemElementUsageCollectOptions options)
   at VI.Projector.SystemElement.GetUsedElements(SystemElementUsageCollectOptions options)
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at VI.Projector.Connection.SystemConnection.<OnGetUsedElements>d__7.MoveNext()
   at VI.Projector.Connection.SystemConnection.get_ConnectorL3Effective()
   at VI.Base.ResetLazy`1.get_Value()
   at System.Lazy`1.LazyInitValue()
   at System.Lazy`1.CreateValue()
   at VI.Projector.Connection.SystemConnection._FactoryExtendConnector()
   at VI.Base.ResetLazy`1.get_Value()
   at System.Lazy`1.LazyInitValue()
   at System.Lazy`1.CreateValue()
   at VI.Projector.Connection.SystemConnection._FactoryWrapConnectorWorker()
   at VI.Projector.Connection.SystemConnectionParameterCollection.Replace(ISystemVariableSet variableSet, Boolean keepMasks)
   at System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator)
   at System.Text.RegularExpressions.RegexReplacement.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat)
   at VI.Projector.Internal.ValueReplacer._FindVarForMatch(Match match)

Can anyone help me on how to solve this issue.

Thanks,

Suresh Y