I had to do this because my corridor kept getting corrupted and was taking too long to process. I ended up doing a save as of the file and then splitting each copy into shorter segments. Its a workaround but point controls and parametric constraints don't update to the new length of the corridor. It also left behind several random lines and features that were within the lengths of the full corridor but not the newer smaller copy of it. So in short it works to copy/do a save as but there are limitations.
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