Error 80040154 UIPath when using Send Outlook mail message activity



Hello everyone,

While using Send Outlook Mail Message Activity , I am getting the error mentioned below.

Error {“message”:"Send Outlook Mail Message : Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."

I am working on Windows 10 (64 bit) and since UIPath studio is 32 bit , I am not able to fix this error. I don’t know how to change the configuration settings.

Please provide suitable guidance on this how to fix this error.



Please check with your client/company IT team, they much have blocked sending email via 3rd party application or they much have changed the Group Policy .


Thanks for the quick response . I have got the trial version of UIPath on my laptop. So can you tell me how I fix this on my system?


It looks like outlook program you’re trying to initialize either isn’t installed on your machine, has a damaged installation or needs to be registered.

Either install it, repair it (via Add/Remove Programs) or register it (via Regsvr32.exe)

if still face problem then let us know :slight_smile:


UI Path Recorder(Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
Facing an issue while Sending Outlook Mail Message

i am facing the same error. i am trying extract data from website using Data Scrapper and store it in a csv file and send it to my mail but it shows this error can anyone plz help me resolve this.


Hi Adi,

Please verify whether you provided the input mail ID in the properties.