Zooming to Extents Deletes Irrigation Zones (Circuiting Tool)
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Zooming to Extents Deletes Irrigation Zones (Circuiting Tool)


You attempted to Zoom to Extents in a drawing that includes Irrigation Zones created with our Circuiting tool. Rather than zooming successfully, the Zoom command is cancelling out and, in the process, deleting your Zones.



The issue is stemming from one of the Xrefs in your drawing. The Xref contains one or more objects that, for some reason, are preventing the Zoom command from working. When this command cancels out in this way, it wipes out your Irrigation Zones.



Step 1: Undo

If you haven't run any commands (or only a few commands) since trying to Zoom to Extents, you should first try the UNDO command (or CONTROL + Z) to attempt to recover your Zones. If UNDO is unable to recover your Zones, you'll need to redraw them after resolving the Xref issue.


Whether or not Step 1 was successful, move on to Step 2.



Step 2: Resolve the Xref Issue

Now to address the issue in your Xrefs. Detach each Xref from your drawing, and run our Nuke tool on each Xref and the main drawing.


The issue should now be resolved, allowing you to redraw your Zones (if necessary).



Step 3 (If Nuking Each Xref Doesn't Resolve the Issue): Remove Errant Objects from Xrefs Manually

If Nuking doesn't solve the issue, you'll need to go through a few more steps.


First, open each Xref file and confirm that:

  • The Xref has two Layout tabs, and
  • Both of these Layout tabs have a nominally zoomed viewport


Once you've made both of these confirmations, complete the following steps on each Xref:


1. Run the REGENALL command (type REA in the Command line, and press Enter). 


2. Type EXTMAX in the Command line, and press Enter


3. Check the EXTMAX value shown in the Command line.


In all likelihood, the EXTMAX value of your drawing is something similar to 1.0e+20., 1.0e+19, etc. (a number in scientific notation that indicates that your site inadvertently occupies an astronomically large area).



Normal EXTMAX value, with decimal numbers


Normal EXTMAX value

Problematic EXTMAX value, in scientific notation


Problematic EXTMAX value


If you see a number in scientific notation, as pictured in the image to the above right, move on to Step 4.


4. Locate, delete, and Purge any errant objects in the drawing that may be causing the issue.


Finding these objects should be fairly easy, as the list of items that can typically cause this issue is short:


5. Once you've removed each errant object from an Xref, run the EXTMAX command again and check the value.


6 If the value is still in scientific notation (example: 1.0e+20), repeat Steps 4 and 5. Once the EXTMAX value is not 1.0e+20, you should be able to redraw your Zones (if necessary) and zoom successfully.

Last modified on May 27, 2022


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