Whenever a Structural Object is moved, there are instances that some objects are not selectable and getting disappeared when the user tries to zoom in.
Please follow the below steps to resolve this.
1. Open Key-in dialog from Home > Common Tools > Key-in.
2. Type “ProStructure Rebuild” and hit enter key. Now, the Message Center will open, here you can see number 6 is for recovering the model.
3. So, type 6 in the Key-in and hit enter key to perform the Remove Parts producing modeler errors.
In this way, one can recover the model from modeler errors by using the ProStructure Rebuild > 6 key-in.