Thanks for your time. i) No, I cannot run regsev32 against this dll because it's 64-bit.  However, use of regasm works fine on a clean machine which is running 64-bit Windows 10. ii) Yes, I am running Installshield when logged in to the server as admin: I have IS 2021 R1, running under Windows Server 2012 R2.  I am running from the Installshield GUI (i.e. not within Visual studio). iii) I cannot see any further dependencies.  However, I do not know how to _prove_ that there are no others - do you have any ideas on how I might do that, please? Thanks again ... View more

Thanks for the info, shunt. I tried this and it had an effect, but still all is not well.  I now get:    "warning -4354: The build was unable to extract information from the file ..... .dll" Please let me have any ideas how to overcome this. Thanks   ... View more

Sorry, I also new to Installshiled and have same question about registering DLLs. Hence, please could you explain where the tick box (mentioned above) hides in IS 2021 R1? Thanks ... View more