### MLB-030 Feature stack does not contain required features

One of the following conditions exist:

1. Feature register is empty;

2. Specified or required feature position is empty;

3. Feature stack does not contain two features;

4. Feature stack does not contain the required features;

5. Feature stack does not contain the required number of points to define the feature.

Effect

Command is not executed.

What you should do

1. Check the command's definition and correct the part program to get the proper data into the feature stack.