Retrieving COM Class Factory Error

Hi,

I am having the below error, while automating workflows. I cant use open browser activity , data scraping or any other activities it gives the below error message.
I even tried with re installing.
I am using community edition.
Can anyone please help me with this.!

Capture

Was there an update to the UiPath you are using? Try downgrading the package UIPath.Core.Activities by one version.

Thanks I will try downgrading. Yes there was an upgrade.

I get the same error suddenly.

UiPath was working yesterday, I start it today and cannot use any Click, Type or Get text activities.

Restarting the machine does not fix the problem.

Reinstalling UiPath fixed the problem, but 2 hours later the error is back.

I have not updated the Core Activities packages recently.

This is very serious because I cannot get work done.

Windows 7 and UiPath 2018.3.3

uipath%20error%20indicate%20element

I found these errors in “C:\Users<username>\AppData\Local\UiPath\Logs\2019-01-11_Studio.txt”. I don’t know if they are relevant. I tried removing the .nuget folder and restarting UiPath, but it did not solve the problem.

12:50:32.6595 => [ERROR] [UiPath.Studio.exe] [31] System.BadImageFormatException: Could not load file or assembly ‘file:///C:\Users<username>.nuget\packages\uipath.python.activities\1.1.6863.33404\lib\net452\x64\Python.Runtime.36.dll’ or one of its dependencies. An attempt was made to load a program with an incorrect format.
File name: ‘file:///C:\Users<username>.nuget\packages\uipath.python.activities\1.1.6863.33404\lib\net452\x64\Python.Runtime.36.dll’
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark)
at System.Reflection.Assembly.LoadFrom(String assemblyFile)
at UiPath.Studio.Plugin.Workflow.Services.AssemblyContainer.TryLoadAssemblyInternal(Dictionary2 cache, Dictionary2 binAssemblies, String path, Assembly& assembly) in D:\a\1\s\Studio\UiPath.Studio.Plugin.Workflow\Services\AssemblyContainer.cs:line 201

12:50:33.4385 => [ERROR] [UiPath.Studio.exe] [31] System.BadImageFormatException: Could not load file or assembly ‘file:///C:\Users<username>.nuget\packages\uipath.pdf.activities\1.2.6863.34697\lib\net40-Client\x86\pdfium.dll’ or one of its dependencies. The module was expected to contain an assembly manifest.
File name: ‘file:///C:\Users<username>.nuget\packages\uipath.pdf.activities\1.2.6863.34697\lib\net40-Client\x86\pdfium.dll’
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark)
at System.Reflection.Assembly.LoadFrom(String assemblyFile)
at UiPath.Studio.Plugin.Workflow.Services.AssemblyContainer.TryLoadAssemblyInternal(Dictionary2 cache, Dictionary2 binAssemblies, String path, Assembly& assembly) in D:\a\1\s\Studio\UiPath.Studio.Plugin.Workflow\Services\AssemblyContainer.cs:line 201

12:50:39.3771 => [ERROR] [UiPath.Studio.exe] [28] $LoadAssembly: Microsoft.Exchange.WebServices.Auth, Version=15.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.
File name: ‘Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’
at System.Signature.GetSignature(Void* pCorSig, Int32 cCorSig, RuntimeFieldHandleInternal fieldHandle, IRuntimeMethodInfo methodHandle, RuntimeType declaringType)
at System.Reflection.RuntimePropertyInfo.get_Signature()
at System.Reflection.RuntimePropertyInfo.get_PropertyType()
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.BinaryAssemblyLoader.#aFc(#Lrc #wAf, MemberInfo #xAf)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.BinaryAssemblyLoader.#cFc(#hsc #4Ub, Type #uAf)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.BinaryAssemblyLoader.#XEc(Assembly #sxc)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.BinaryAssemblyLoader.#iFc(Assembly #sxc)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.AssemblyRepositoryBase.#30j(Assembly #sxc, IAssemblyName #4tc, IBinaryAssemblyMetadata #RDb)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.AssemblyRepositoryBase.Create(Assembly assembly, IAssemblyName assemblyName, IBinaryAssemblyMetadata metadata)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.FileBasedAssemblyRepository.Create(Assembly assembly, IAssemblyName assemblyName, IBinaryAssemblyMetadata metadata)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.FileBasedAssemblyRepository.GetOrCreate(Assembly assembly, IAssemblyName assemblyName, String location)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.AssemblyRepositoryBase.#uBh(Assembly #sxc, IAssemblyName #4tc, String #bVe)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.AssemblyRepositoryBase.Load(Assembly assembly, IAssemblyName assemblyName)
at ActiproSoftware.Text.Languages.DotNet.Reflection.Implementation.AssemblyRepositoryBase.Load(String fullName)
at UiPath.Studio.Plugin.Workflow.ExpressionEditor.SyntaxService.LoadAssembly(LoadIntellisenseAssembliesContext context, String assemblyName, CancellationToken cancellationToken) in D:\a\1\s\Studio\UiPath.Studio.Plugin.Workflow\ExpressionEditor\SyntaxService.cs:line 419

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
, HResult -2147024894

Hi @krbg00

Is the issue still present?

Is it plausible for you to update to the latest version 2018.4.2?

After installing 2018.4.2 the problem went away.

1 Like

Actually the problem is still there, it just took a little longer before the error reappeared. I have to reinstall twice every day now.

I suspected I had a broken Windows install, so I reinstalled Windows and the problem disappeared.

yes , i do have problem with this version. Could you give me permanent solution for this