Amazon Workdocs Drive on Windows always returns "Cannot start Amazon Workdocs Drive because another device is mounted at P:"

This sounds like a permissions error where the user you're logged in as doesn't have some Windows rights to create a drive letter.

I'd recommend getting in touch with our support team - they can look at the logs for WorkDocs Drive to determine what is happening under the hood.

My user is an administrator and workdocs drive has been working for a while before starting to return the error on the drive letter

Today I've taken a look at the event viewer and found two events at the exact time of the error.

This:

Log Name:      Application
Source:        Application Error
Date:          15/06/2023 09:12:59
Event ID:      1000
Task Category: Application Crashing Events
Level:         Error
Keywords:      
User:          RASVINB005VM001\agiovacchini
Computer:      RASVINB005VM001
Description:
Faulting application name: AWSWorkDocsDriveClient.exe, version: 1.0.9710.0, time stamp: 0x645333c2
Faulting module name: KERNELBASE.dll, version: 10.0.22621.1778, time stamp: 0x63f72683
Exception code: 0xe0434352
Fault offset: 0x000000000006536c
Faulting process ID: 0x0x1D04
Faulting application start time: 0x0x1D99F543415774C
Faulting application path: C:\Program Files\Amazon\AWSWorkDocsDriveClient\AWSWorkDocsDriveClient.exe
Faulting module path: C:\Windows\System32\KERNELBASE.dll
Report ID: ad5fc172-5faa-48af-82e9-6a686106c130
Faulting package full name: 
Faulting package-relative application ID: 
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" Guid="{a0e9b465-b939-57d7-b27d-95d8e925ff57}" />
    <EventID>1000</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>100</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8000000000000000</Keywords>
    <TimeCreated SystemTime="2023-06-15T07:12:59.3217950Z" />
    <EventRecordID>9841</EventRecordID>
    <Correlation />
    <Execution ProcessID="10600" ThreadID="11996" />
    <Channel>Application</Channel>
    <Computer>RASVINB005VM001</Computer>
    <Security UserID="S-1-5-21-2503753742-2277885320-3210220112-1001" />
  </System>
  <EventData>
    <Data Name="AppName">AWSWorkDocsDriveClient.exe</Data>
    <Data Name="AppVersion">1.0.9710.0</Data>
    <Data Name="AppTimeStamp">645333c2</Data>
    <Data Name="ModuleName">KERNELBASE.dll</Data>
    <Data Name="ModuleVersion">10.0.22621.1778</Data>
    <Data Name="ModuleTimeStamp">63f72683</Data>
    <Data Name="ExceptionCode">e0434352</Data>
    <Data Name="FaultingOffset">000000000006536c</Data>
    <Data Name="ProcessId">0x1d04</Data>
    <Data Name="ProcessCreationTime">0x1d99f543415774c</Data>
    <Data Name="AppPath">C:\Program Files\Amazon\AWSWorkDocsDriveClient\AWSWorkDocsDriveClient.exe</Data>
    <Data Name="ModulePath">C:\Windows\System32\KERNELBASE.dll</Data>
    <Data Name="IntegratorReportId">ad5fc172-5faa-48af-82e9-6a686106c130</Data>
    <Data Name="PackageFullName">
    </Data>
    <Data Name="PackageRelativeAppId">
    </Data>
  </EventData>
</Event>

and this:

Log Name:      Application
Source:        .NET Runtime
Date:          15/06/2023 09:12:59
Event ID:      1026
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      RASVINB005VM001
Description:
Application: AWSWorkDocsDriveClient.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: CBFS_Connect.ECBFSConnectError
   at AWSWorkDriveClient.FileSystem.FileSystemManager.DeleteStorage()
   at AWSWorkDriveCommon.Util.Functions+<>c__DisplayClass3_0.<ToFunc>b__0()
   at AWSWorkDriveCommon.Metrics.MetricsUtils.Instrument[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](AWSWorkDriveCommon.Metrics.MetricsReport, System.String, System.Nullable`1<UInt64>, System.Func`1<System.__Canon>, Boolean)
   at AWSWorkDriveClient.Drive.Unmount(AWSWorkDriveCommon.Metrics.MetricsReport)
   at AWSWorkDriveCommon.Util.Optional`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].IfPresent(System.Action`1<System.__Canon>)
   at AWSWorkDriveClient.WorkDriveClient+<>c__DisplayClass37_0.<HandleAppShutdown>b__0()
   at AWSWorkDriveCommon.Util.Functions+<>c__DisplayClass3_0.<ToFunc>b__0()
   at AWSWorkDriveCommon.Util.Functions.GatedAccessRun[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](Int64 ByRef, AWSWorkDriveCommon.Util.GatedAccess, System.Func`1<System.__Canon>)
   at AWSWorkDriveClient.WorkDriveClient.HandleAppShutdown(AWSWorkDriveCommon.Util.Optional`1<System.Object>)
   at AWSWorkDriveClient.WorkDriveClient.Main(System.String[])


Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name=".NET Runtime" />
    <EventID Qualifiers="0">1026</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2023-06-15T07:12:59.0460115Z" />
    <EventRecordID>9840</EventRecordID>
    <Correlation />
    <Execution ProcessID="7428" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>RASVINB005VM001</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Application: AWSWorkDocsDriveClient.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: CBFS_Connect.ECBFSConnectError
   at AWSWorkDriveClient.FileSystem.FileSystemManager.DeleteStorage()
   at AWSWorkDriveCommon.Util.Functions+&lt;&gt;c__DisplayClass3_0.&lt;ToFunc&gt;b__0()
   at AWSWorkDriveCommon.Metrics.MetricsUtils.Instrument[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](AWSWorkDriveCommon.Metrics.MetricsReport, System.String, System.Nullable`1&lt;UInt64&gt;, System.Func`1&lt;System.__Canon&gt;, Boolean)
   at AWSWorkDriveClient.Drive.Unmount(AWSWorkDriveCommon.Metrics.MetricsReport)
   at AWSWorkDriveCommon.Util.Optional`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].IfPresent(System.Action`1&lt;System.__Canon&gt;)
   at AWSWorkDriveClient.WorkDriveClient+&lt;&gt;c__DisplayClass37_0.&lt;HandleAppShutdown&gt;b__0()
   at AWSWorkDriveCommon.Util.Functions+&lt;&gt;c__DisplayClass3_0.&lt;ToFunc&gt;b__0()
   at AWSWorkDriveCommon.Util.Functions.GatedAccessRun[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](Int64 ByRef, AWSWorkDriveCommon.Util.GatedAccess, System.Func`1&lt;System.__Canon&gt;)
   at AWSWorkDriveClient.WorkDriveClient.HandleAppShutdown(AWSWorkDriveCommon.Util.Optional`1&lt;System.Object&gt;)
   at AWSWorkDriveClient.WorkDriveClient.Main(System.String[])

</Data>
  </EventData>
</Event>