The following appears when importing / opening a model in AutoPIPE:
---------------------------Note---------------------------N144-26: B31.3 and B31.1 material libraries can be updated with instructions given in the Online help Reference Information.
For all other libraries please contact Bentley Technical Support---------------------------OK ---------------------------
why and how to avoid it?
As indicated in the message, see the following AutoPIPE help section:
Help ribbon> Contents button> Contents Tab> Reference Information> Libraries > Libraries document, See also " Adding Materials to the Flange Check Material Library "
In addition, for more information see WIKI page here.
"Note" Messages in AutoPIPE
Bentley AutoPIPE