With a windows service, Word file conversion error

[jbourree]

By launching the conversion of a word document in a webservice, I have the error "The file 'doc.docx' seems to be corrupt, error: Object reference not set to an instance of an object".
Is there a special configuration for windows services? The same conversion from a console application works.

[Sicos1977]

Are you running this service under another user?

[Sicos1977]

If so then make sure you have given this user launch permissions for the different office applications with this tool --> https://docs.microsoft.com/en-us/windows/win32/com/setting-processwide-security-using-dcomcnfg

[jbourree]

The service running with the same user as the one with which word is installed.

[jbourree]

The problem is not DCOM.
The fix is to create the directories:
Windows x64: C:\Windows\SysWOW64\config\systemprofile\Desktop
Windows x86: C:\Windows\System32\config\systemprofile\Desktop

[Minhounet]

I must add that "C:\Windows\System32\config\systemprofile\Desktop" must be created through windows explorer (and not a dos command line) as there is a Windows file redirection (that costs me a lot of days..).