2D files has all of a sudden 3D elements ( I have full version but my team has LT)

[gkhalilAPG65]

Hello,

I am currently facing a puzzling issue with one of my AutoCAD files, and I'm hoping to get some guidance from the experts here.

Problem Description:

Despite using our standard procedures and templates, my file has suddenly developed several 3D issues.

My standard situation

1. Saved UCS and Blocks:

   • Our saved UCS for this project, which we have always used, are flat with no issues.

   • The blocks from our template are all 2D.

2. Engineer and Designer Files:

   • The engineers and designers we work with also use clean files, which we have checked and verified one by one.

The issue : 

However, despite these precautions, the following problems have arisen:

1. Plans on Different Z Planes:

   • I have several plans that are each on a different Z plane, which shouldn't be the case.

2. Lines Jumping Between Z Planes:

   • There are lines that jump between different Z axes unexpectedly.

3. Hatches with Incorrect Elevation:

   • Hatches that indicate they are at elevation 0 are actually not.

Steps Taken:

• Verified and confirmed the UCS settings are correct.

• Checked that all blocks in the template are 2D, but found some blocks created inside the drawing that aren't.

• Ensured that the engineer and designer files are clean and properly set up.

• Attempted to manually adjust the Z values, but the issues persist.

• Tried using Flatten, but it doesn’t work most of the time.

• Used the move 1e99 trick, which caused everything to explode into endless lines.

• Attempted Flatshot, but it doesn't detect solids.

Request:

Has anyone encountered similar issues or have any suggestions on what might be causing these problems? I would like to understand why this happened so that I can implement an adjusted protocol. Any advice on how to troubleshoot and resolve these 3D anomalies would be greatly appreciated.

Thank you in advance for your help!

as you can see three are several work planes along the z axis

the large element on the right is my protocole reference while on the left is the plan we're currently working on, it's not the most impacted plan but here you can clearly see the issue

[cadffm]

Hi,

I can't see or read a special problem, so for me it is clear, IF elevation and ucs is always fine (and if you are using DWG XRefs, also the xRef DWGbasepoint is set to wcs-z=0):

The issue came from " wrong " templates, 

copy&paste from files who are not all-on-WKS-z=0

The chance that someone accidently send z Data is <1%,

but if you have objects with z/=0, you use this z-Vealue everytime if you use osnaps to get from or set to a snap point of this item.

(LT don't have OsnapZ)

[pendean]

Do you all have an experienced CAD manager?
Are these all external-sourced DWG files from others and not created internally by your team?

You all appear to have lost control of your content:
1) "plans on different Z elevations" is a drafter/content creator error, it has little or nothing to do with the program: do you all set UCS and PLAN commands to WORLD 100% of the time in all of your files BEFORE you start creating content?
Or just 'saveas' existing file and perhaps just carry along pre-set issues then add to them?

2) "line jumping between Z..." is how autocad (and LT) works if you are using running osnaps and your content is all over the place (see item #1 above): this goes back to content creation and missed opportunities to fix at the start of the file.

3) "hatches at incorrect Z..." is how the program works based on where you placed your content: again, this goes back to #1, control of your content at creation time, all the responsibility of the file creator.

Unless you can share sample DWG files here.... I recommend you open each of these DWG files, set UCS and PLAN commands to WORLD, then start investigating how the loss of Z location started and fix it.