Error Starting a Production Activity through MES

I am Getting errors logging in users into any job with MES Menu. Hopefully someone can help me on this

Loading MES for Test (the environment we have been working in), I log in as either manager or myself , then I enter the employee ID, that works fine, then I click “Start Production Activity”, the “Star Production Activity” window appears, I enter the job number, the assembly number, the operation number, then I click OK, it on the bottom left hand corner of the window you can see “Saving Data…” that will go on for about 5 minutes then we get a “Server Side Error” reading

A server error occurred. Review the server event logs for details.

Summary reads

Server Side Exception

A server error occurred. Review the server event logs for details.

Exception caught in: Epicor.ServiceModel

Error Detail

Correlation ID: c5e00fee-7fc3-44e5-886c-adb019777002
Description: A server error occurred. Review the server event logs for details.
Program: Epicor.Ice.Server.Wcf.Core.dll
Method: ProvideFault
Line Number: 33
Column Number: 17
Server Trace Stack: at Epicor.Hosting.Wcf.ErrorHandler.ProvideFault(Exception error, MessageVersion version, Message& fault) in C:_Releases\ICE\ICE3.2.700.0\Source\Framework\Ice.Server.Wcf.Core\Hosting\Wcf\ErrorHandler.cs:line 33
at System.ServiceModel.Dispatcher.ErrorBehavior.ProvideFault(Exception e, FaultConverter faultConverter, ErrorHandlerFaultInfo& faultInfo)
at System.ServiceModel.Dispatcher.ErrorBehavior.ProvideMessageFaultCore(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage8(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.ProcessError(Exception e)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
at System.ServiceModel.Dispatcher.ChannelHandler.DispatchAndReleasePump(RequestContext request, Boolean cleanThread, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.HandleRequest(RequestContext request, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.AsyncMessagePump(IAsyncResult result)
at System.ServiceModel.Dispatcher.ChannelHandler.OnAsyncReceiveComplete(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.SecurityChannelListener1.ReceiveItemAndVerifySecurityAsyncResult2.InnerTryReceiveCompletedCallback(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.TryReceiveAsyncResult.OnReceive(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.OnReceiveComplete(Object state)
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
at System.Net.Security.NegotiateStream.ProcessFrameBody(Int32 readBytes, Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.NegotiateStream.ReadCallback(AsyncProtocolRequest asyncRequest)
at System.Net.AsyncProtocolRequest.CompleteRequest(Int32 result)
at System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32 bytes)
at System.Net.FixedSizeReader.ReadCallback(IAsyncResult transportResult)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.ConnectionStream.IOAsyncResult.OnAsyncIOComplete(Object state)
at System.Net.Sockets.SocketAsyncEventArgs.OnCompleted(SocketAsyncEventArgs e)
at System.Net.Sockets.SocketAsyncEventArgs.FinishOperationSuccess(SocketError socketError, Int32 bytesTransferred, SocketFlags flags)
at System.Net.Sockets.SocketAsyncEventArgs.CompletionPortCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)

Client Stack Trace

at Epicor.ServiceModel.Channels.ImplBase`1.ShouldRethrowNonRetryableException(Exception ex, DataSet[] dataSets)
at Erp.Proxy.BO.LaborImpl.Update(LaborDataSet ds)
at Erp.Adapters.LaborAdapter.OnUpdate()
at Ice.Lib.Framework.EpiBaseAdapter.Update()
at Erp.UI.App.StartProductionActivityEntry.StartProdTransaction.Update()

I was able to find this post, the had a similar issue, and fixed my issue because of it, he found it was a partTrans issue, but I want to know how he found this to be the issue