OpenDataSource freeze

[luisKjuarez]

Hi, i created an application to scann over web browser, i have a web service running and listening for http messages, when it call the scanner application (by System.Diagnostics.Process) it freezes at OpenDataSource function but works fine when i run it with double click or debugging on Visual studio. Can You help me?

I realized this because i use log file and never print after OpenDataSource function. here is the code that i use

` try {

                    this._twain32.SourceIndex = 0;
                    writeLogLine("first log");
                   Boolean opened=   this._twain32.OpenDataSource( );
                    if (opened == true)
                    {
                        writeLogLine("log 2" );
                        var _isSupported = (this._twain32.Capabilities.ExtImageInfo.IsSupported() & TwQC.Get) != 0;
                        this._isExtImageInfoAllowed = _isSupported && this._twain32.Capabilities.ExtImageInfo.GetCurrent(); 
                    }
                }
                catch
                {
                    writeLogLine("log fail");
                 }
                writeLogLine("log end"); `

[luisKjuarez]

i found the problem, it was a datasource wich isn't compatible with twain2 it throws an exception, but i don't know why if i run this application with double click, or debugging the exception is catched, but calling the application by system.diagnostics.process it hangs and the exception never catched.

i just added

if (_twain32.GetIsSourceTwain2Compatible(0) == true)

then it works, but i would like to know why it doesn´t work properly with diagnostics.process

best regards

[saraff-9EB1047A4BEB4cef8506B29BA325BD5A]

Hello, @luisKjuarez I think that it can be related with redirect STD IO streams. maybe your the app wait users inputs. Try see the Saraff.Twain.NET CS Samples