# Any function using UserAuthorizationSystem causes Unknown error (0xC004FFFF) by RW 6.08

**URL:** <https://tech-community.robotics.abb.com/t/any-function-using-userauthorizationsystem-causes-unknown-error-0xc004ffff-by-rw-6-08/8772>\
**Category:** Developer Tools\
**Tags:** rw-6-08, rw-6-05, pc-sdk, user-authentication-system\
**Created:** [April 2, 2019, 8:56pm UTC](https://tech-community.robotics.abb.com/t/any-function-using-userauthorizationsystem-causes-unknown-error-0xc004ffff-by-rw-6-08/8772 "2019-04-02T20:56:53Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Runesmacher](https://avatars.discourse-cdn.com/v4/letter/r/67e7ee/32.png) [@Runesmacher](https://tech-community.robotics.abb.com/u/Runesmacher)\
**Post date:** [April 2, 2019, 8:56pm UTC](https://tech-community.robotics.abb.com/t/any-function-using-userauthorizationsystem-causes-unknown-error-0xc004ffff-by-rw-6-08/8772/1 "2019-04-02T20:56:53Z")

</div>

We recently updated our Robots from RW 6.05.00.04 to RW 6.08.01.00

We use a program to change some config settings in the robot more easily.  
Since the upgrade to RW 6.08 i am getting the following error while executing anything with the UserAuthorizationSystem. I tested multiple things (even getCurrentGrants and GetGrantTypes) All are giving me the following error.

The controller is already logged on as Default User and i am trying to check if this user has the grants for writing configurations. (To see if i need to show a seperate login screen for ex. Administrator)

Small code snipet (2nd line gives error)

UserAuthorizationSystem uas = controller.AuthenticationSystem;  
if (!uas.CheckDemandGrant(Grant.WriteConfiguration))

Error:

ABB.Robotics.GenericControllerException  
HResult=0xC004FFFF  
Message=C004FFFF : Unknown error (0xC004FFFF)  
剅佒㩒爠桤损湯牴汯敬⹲灣孰㐵㈴㩝漠杲损摯㩥ⴠ㔷‷敮彷潣敤›砰っ㐰晦晦※  
Url: Cmd:READ Prop:UASConfig -Part Grants Args: Elapsed:17 CurrentCmds:0  
History:  
-00:00:16.1914043 [4] status:294912 data:-noelts,all,mark,cc 6,1, 0, …  
-00:00:16.1914043 [3] status:294912 data:0  
-00:00:16.1854204 [5] SendCommand url: cmd:Set prop:LogoffUser arg:-Uid 2  
-00:00:16.1634799 [5] status:294912 data:  
-00:00:16.1594907 [6] SendCommand url: cmd:Set prop:LogonUser arg: -locale Remote -app “” -loc “PC\_NAME” -alias “PC\_USER”  
-00:00:16.1325634 [6] status:294912 data:-Uid 3  
-00:00:16.1325634 [7] SendCommand url: cmd:Get prop:IsOptionPresent arg:-Option PCIN  
-00:00:16.1126168 [7] status:294912 data:-OptionPresent 1  
-00:00:16.1126168 [8] SendCommand url:/CONFIG/MMC/IOVIEW\_BLOCK/IOViewBlockIfMotorsOff/enabled cmd:Get prop:Value arg:  
-00:00:16.0926705 [9] SendCommand url: cmd:Set prop:LogoffUser arg:-Uid 3  
-00:00:16.0926705 [8] status:294912 data:0  
-00:00:16.0717267 [9] status:294912 data:  
-00:00:16.0707312 [10] SendCommand url: cmd:Set prop:LogonUser arg: -locale Remote -app “” -loc “PC\_NAME” -alias “PC\_USER”  
-00:00:16.0467953 [10] status:294912 data:-Uid 6  
-00:00:16.0467953 [11] SendCommand url: cmd:Get prop:IsOptionPresent arg:-Option PCIN  
-00:00:16.0268482 [11] status:294912 data:-OptionPresent 1  
-00:00:16.0268482 [12] SendCommand url:/CONFIG/MMC/IOVIEW\_BLOCK/IOViewBlockIfMotorsOff/enabled cmd:Get prop:Value arg:  
-00:00:15.9989231 [12] status:294912 data:0  
-00:00:00.0189629 [13] SendCommand url: cmd:READ prop:UASConfig -Part Grants arg:  
-00:00:00.0010109 [13] status:-1073414145 data:剅佒㩒爠桤损湯牴汯敬⹲灣孰㐵㈴㩝漠杲损摯㩥ⴠ㔷‷敮彷潣敤›砰っ㐰晦晦※

Source=ABB.Robotics.Controllers.PC  
StackTrace:  
at Adapters.Uas.GetUasConfig()  
at Internal.Uas.LoadConfiguration()  
at Internal.Uas.LoadGrants()  
at Internal.Uas.CheckGrant(String grant)  
at ABB.Robotics.Controllers.UserAuthorizationSystem.CheckDemandGrant(String grant, String& value)  
at ABB.Robotics.Controllers.UserAuthorizationSystem.CheckDemandGrant(Grant grant)  
at RobotInstaller.FormRobotInstaller.buttonInstallRobotConfig\_Click(Object sender, EventArgs e) in C:\Git\Robotics\tooling\RobotInstaller\RobotInstaller\FormRobotInstaller.cs:line 83  
at System.Windows.Forms.Control.OnClick(EventArgs e)  
at System.Windows.Forms.Button.OnClick(EventArgs e)  
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)  
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)  
at System.Windows.Forms.Control.WndProc(Message& m)  
at System.Windows.Forms.ButtonBase.WndProc(Message& m)  
at System.Windows.Forms.Button.WndProc(Message& m)  
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)  
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)  
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)  
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)  
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)  
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)  
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)  
at System.Windows.Forms.Application.Run(Form mainForm)  
at RobotInstaller.Program.Main() in C:\Git\Robotics\tooling\RobotInstaller\RobotInstaller\Program.cs:line 16

Inner Exception 1:  
RobApiException: C004FFFF : Unknown error (0xC004FFFF)  
剅佒㩒爠桤损湯牴汯敬⹲灣孰㐵㈴㩝漠杲损摯㩥ⴠ㔷‷敮彷潣敤›砰っ㐰晦晦※  
Url: Cmd:READ Prop:UASConfig -Part Grants Args: Elapsed:17 CurrentCmds:0  
History:  
-00:00:16.1914043 [4] status:294912 data:-noelts,all,mark,cc 6,1, 0, …  
-00:00:16.1914043 [3] status:294912 data:0  
-00:00:16.1854204 [5] SendCommand url: cmd:Set prop:LogoffUser arg:-Uid 2  
-00:00:16.1634799 [5] status:294912 data:  
-00:00:16.1594907 [6] SendCommand url: cmd:Set prop:LogonUser arg: -locale Remote -app “” -loc “PC\_NAME” -alias “PC\_USER”  
-00:00:16.1325634 [6] status:294912 data:-Uid 3  
-00:00:16.1325634 [7] SendCommand url: cmd:Get prop:IsOptionPresent arg:-Option PCIN  
-00:00:16.1126168 [7] status:294912 data:-OptionPresent 1  
-00:00:16.1126168 [8] SendCommand url:/CONFIG/MMC/IOVIEW\_BLOCK/IOViewBlockIfMotorsOff/enabled cmd:Get prop:Value arg:  
-00:00:16.0926705 [9] SendCommand url: cmd:Set prop:LogoffUser arg:-Uid 3  
-00:00:16.0926705 [8] status:294912 data:0  
-00:00:16.0717267 [9] status:294912 data:  
-00:00:16.0707312 [10] SendCommand url: cmd:Set prop:LogonUser arg: -locale Remote -app “” -loc “PC\_NAME” -alias “PC\_USER”  
-00:00:16.0467953 [10] status:294912 data:-Uid 6  
-00:00:16.0467953 [11] SendCommand url: cmd:Get prop:IsOptionPresent arg:-Option PCIN  
-00:00:16.0268482 [11] status:294912 data:-OptionPresent 1  
-00:00:16.0268482 [12] SendCommand url:/CONFIG/MMC/IOVIEW\_BLOCK/IOViewBlockIfMotorsOff/enabled cmd:Get prop:Value arg:  
-00:00:15.9989231 [12] status:294912 data:0  
-00:00:00.0189629 [13] SendCommand url: cmd:READ prop:UASConfig -Part Grants arg:  
-00:00:00.0010109 [13] status:-1073414145 data:剅佒㩒爠桤损湯牴汯敬⹲灣孰㐵㈴㩝漠杲损摯㩥ⴠ㔷‷敮彷潣敤›砰っ㐰晦晦※

Does anyone has any idea why this can be? and how i can get this resolved?  
The exact same program works on the RW 6.05 version.

Thanks in advance for any info.