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The steps below will help to register the DAO360.dll file. This is sometimes needed in cases where an error is encountered when opening a Hydraulics & Hydrology product or model file, with the details of the error mentioning "engineeringlibraries".
The following command can be run from a command line window or Start Menu > Run window. It is important to use correct punctuation and capitalization. After typing it in press enter.
In a 32 bit machine: regsvr32 "C:\Program Files\Common Files\Microsoft Shared\DAO\DAO360.dll"
In a 64 bit machine:regsvr32 "C:\Program Files (x86)\Common Files\Microsoft Shared\DAO\DAO360.dll"
After typing the above command, press Enter and a message similar to the following will be displayed:
Now try opening the program and see if the issue is resolved.
If you still get the error, try the steps in this article.