Does anybody know why once and a while the pipe structures in the Pipe Sturcture Library in a certain project file will just disappear? Once this happens we have to recreate them in that project. They will work until you open the project again and then they are gone.
We've tried copying the blkcor.pst and blkdef.pst files, which look okay, from the LDD pipeworks directory to the project pipeworks file. This doesn't seem to fix anything.
We're using LDD 2004, but have had this problem occasionally before with earlier versions. Anybody have any suggestions as to why this happens or fixes?
Thanks.