Error: Unable to write data to locked layer: ???

Do you get this error when opening a drawing file in Land Desktop?
Background Info:

A block named "ADCADD_ZZ" gets inserted by LDT into the 1st layout tab. This block includes information about the name of the project (database) that the drawing is attached to and the drawing setup information.

Solution:

- Change the "ADCADD_ZZ" block layer to Zero (0) and/or unlock it's layer.

- Since you can't select the object with a mouse you have to use something like Quick Select to grab it to change its layer.

How to repeat this error:
- Create a new file using Land Enabled Map.
- Lock the current layer then save & close.
- Open the same drawing using LDT and you'll get a message box with the Unable to... error.

AutoCAD Licensing Issue with LDT & Civil 3D

This post is more venting than knowledge passing. Sorry about that. Maybe you'll come across this prior to asking for new license files from your Autodesk Reseller. This is my story as I write this...

I contacted my Reseller for new license files for 2008 Land Desktop, Civil Design, Survey, Raster Design, & Civil 3D (C3D). I quickly learned Autodesk changed the packages from 2007 to 2008. They now give you the LDT package free and bundled with Civil 3D.

Here's my situation. I have 24 Civil 3D and 18 LDT licenses. Why, long story. Here I'm sitting with 2 icons on my desktop, C3D & LDT. The first 24 users who need LDT open AutoCAD using the C3D icon then access LDT through a Workspace. The next 18 have to use the LDT icon (normal procedure) or they will receive a lovely License Error. This is obviously a problem. I suppose I understand where Autodesk is coming from. If they give me 42 LDT licenses and 24 C3D licenses then I will actually be able to use 66 LDT instances. I'm forced to change my user's habits before we begin the great transformation to C3D.

Here's my solution. May not be the best, but it is one without confusing 42+ people.
- Configure both LDT & C3D installs with all customization the same regarding LDT.
- Choose 24 of my top power users and install only Civil 3D on their work stations. Maybe they'll start exploring and learn something new to boost performance.
- The rest of them get LDT installed.

This is an administrative nightmare but one I will have to deal with till we upgrade all LDT licenses to C3D. If you have to deal with dispersed license servers like myself this is even a bigger deal. How many of which where, Hmmm..., What if...

Good Luck to all who are making the switch to Civil 3D. The good thing is that we're not alone!