OCR Error

[rmia001 (Morris Miao)]

Scenario: Trying to make a simple OCR activity using Google OCR, in a non-English language, already got the corresponding tessdata placed its folder under UiPath installation directory.

Steps to reproduce: Load Image as the source, Google OCR, Message Box as the output

Current Behavior: Exception threw.

Expected Behavior: Pop me up with the desired texts from image.

Studio/Robot/Orchestrator Version:2016.2

Last stable behavior:N/A
Last stable version:N/A
OS Version:Windows 8.1
Others if Relevant: (workflow, logs, .net version, service pack, etc):
Main has thrown an exception

Message: One or more errors occurred.

Source: Google OCR

Exception Type: AggregateException

System.AggregateException: One or more errors occurred. —> System.Exception: Error scraping using host process. Service is not available. —> System.ServiceModel.CommunicationException: There was an error reading from the pipe: Unrecognized error 109 (0x6d). —> System.IO.PipeException: There was an error reading from the pipe: Unrecognized error 109 (0x6d).
at System.ServiceModel.Channels.PipeConnection.FinishSyncRead(Boolean traceExceptionsAsErrors)
at System.ServiceModel.Channels.PipeConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
— End of inner exception stack trace —

Server stack trace:
at System.ServiceModel.Channels.PipeConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.DelegatingConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.SessionConnectionReader.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.SynchronizedMessageSource.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.TryReceive(TimeSpan timeout, Message& message)
at System.ServiceModel.Dispatcher.DuplexChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at UiPath.Vision.OCR.Service.IHostService.Scrape(OCRInput input, OCROptions options, OCROutput& output)
at UiPath.Vision.OCR.Service.HostServiceProxy.Scrape(OCRInput input, OCROptions options, OCROutput& output)
— End of inner exception stack trace —
at UiPath.Vision.OCR.Service.HostServiceProxy.Scrape(OCRInput input, OCROptions options, OCROutput& output)
at UiPath.Vision.OCR.OCRClient.<>c__DisplayClass4_0.b__0()
at System.Threading.Tasks.Task`1.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
— End of inner exception stack trace —

Server stack trace:
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at UiPath.Vision.OCR.OCRClient.ScrapeUsingHostService(OCRInput input, OCROptions options, CancellationToken cancelToken)
at UiPath.Vision.OCR.OCRClient.Scrape(OCRInput input, OCROptions options, CancellationToken cancelToken, Boolean useHostProcess)
at UiPath.Vision.UiImage.ScrapeOCR(OCROptions options, CancellationToken cancellationToken)
at UiPath.Core.Activities.OCREngineActivity.<>c__DisplayClass36_0.b__0()
at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object args, Object server, Object& outArgs)
at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
at System.Func1.EndInvoke(IAsyncResult result) at UiPath.Core.Activities.OCREngineActivity.EndExecute(AsyncCodeActivityContext context, IAsyncResult result) at System.Activities.AsyncCodeActivity1.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)
at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)
—> (Inner Exception #0) System.Exception: Error scraping using host process. Service is not available. —> System.ServiceModel.CommunicationException: There was an error reading from the pipe: Unrecognized error 109 (0x6d). —> System.IO.PipeException: There was an error reading from the pipe: Unrecognized error 109 (0x6d).
at System.ServiceModel.Channels.PipeConnection.FinishSyncRead(Boolean traceExceptionsAsErrors)
at System.ServiceModel.Channels.PipeConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
— End of inner exception stack trace —

Server stack trace:
at System.ServiceModel.Channels.PipeConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.DelegatingConnection.Read(Byte buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.SessionConnectionReader.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.SynchronizedMessageSource.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.Receive(TimeSpan timeout)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.TryReceive(TimeSpan timeout, Message& message)
at System.ServiceModel.Dispatcher.DuplexChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at UiPath.Vision.OCR.Service.IHostService.Scrape(OCRInput input, OCROptions options, OCROutput& output)
at UiPath.Vision.OCR.Service.HostServiceProxy.Scrape(OCRInput input, OCROptions options, OCROutput& output)
— End of inner exception stack trace —
at UiPath.Vision.OCR.Service.HostServiceProxy.Scrape(OCRInput input, OCROptions options, OCROutput& output)
at UiPath.Vision.OCR.OCRClient.<>c__DisplayClass4_0.b__0()
at System.Threading.Tasks.Task`1.InnerInvoke()
at System.Threading.Tasks.Task.Execute()<—

[ddpadil (Dilip)]

please attach snapshot of your workflow.

[rmia001 (Morris Miao)]

Hi ddpadil,

Attached. Many thanks for your help.

Main.xaml (14.7 KB)

The language is Chinese Simplified: tessdata/chi_sim.traineddata at 3.04.00 · tesseract-ocr/tessdata · GitHub

[vvaidya (Vinay Vaidya)]

Did you check this?

OCR different language

Having this exactly same problem with finnish language pack I’ve had this problem for months but just tried to work around it for some reason…

[rmia001 (Morris Miao)]

Hi vvaidya,

Thanks for your reply. Yes, I guess when they said “v3.4” that means the 3.04 which I attached in my last post. Because another version available there is now 4.0…

Any other thoughts?

[shenhong]

Did you resolve this problem? I also meet this problem.

[rmia001 (Morris Miao)]

Nope, feel free to add me on WeChat (rmia001), we can discuss and see how we could get it…