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Device Automation Service Locks and Unlocks Without Warnings or Errors


Question / Problem: 

When testing a DAS robot in Design Studio, opening the DA workflow or clicking Prepare Execution (v11.x), the device locks for about 5 seconds, then unlocks.

Answer / Solution: 

Download and install Visual C++ Redistributable for Visual Studio 2015 (32-bit) from Microsoft. DAS requires this file and is installed via the Device Automation Service installer .msi file. In some cases, environmental issues may prevent this from installing.


DAS 11.x:

Since Visual Studio 2015, Microsoft delivers one package for VS 2015, 2017 and 2019. It can be downloaded from official Microsoft website. Go to:

and find "Microsoft Visual C++ Redistributable for Visual Studio 2019" for x86.”


DAS 10.6 and DAS 10.7 installers have VC Redistributable 2013 and VC Redistributable 2015.

VC Redist 2013:

All packages are 32 bit (x86).


Additional Information:

Details of some errors that may help validate this symptom (from DAS log):

2020-10-09 15:57:24,254 [14] DEBUG DAS - Error: The specified module could not be found.
2020-10-09 15:57:24,255 [14] DEBUG DAS - \\?\C:\ProgramData\Kofax RPA\\node_modules\automationnative\automationnative.node

2020-10-13 11:53:27,088 [13] WARN JabInstaller - Cannot read java type from path D:\Program Files\Java\jre7 System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo) at DesktopAutomationServiceControl.JabInstall.JavaHomeReader.GetJavaVersionFromPath(String path)

 2020-10-13 11:53:27,096 [13] DEBUG JabInstaller - Could not get information for Java path D:\Program Files\Java\jre7

Applies to:  

Product Version
Kapow / RPA 10.x / 11.x



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