I'm currently working with river networks, and having been trying to copy and paste couple hundreds of streams within a geometric network at a time, but my arcmap always become non-responsive, or takes couple hours to complete the pasting. Is there a limited number of feature that I can copy/paste? Is there any known bugs to the issue? and can the issue be related to using SDE databases?
It is likely to be network and SDE delays. Copy the editing dataset to a local file geodatabase, edit it and then replace it in SDE at the end. The extra steps will be still worth it.
Another technique is to tag all the features to be moved in an attribute and reselect/merge them at the end.
