Many of us have taken advantage of this great feature in ArchiCAD’s attribute settings. We have the ability to globally replace all elements attributes with another, wether it is building materials, surfaces, line types, fill types or composites. Zone tags and pen sets are also available, but rarely changed from the template.
The feature allows a quick clean up with little worry of missing attributes… Unless you forgot to reserve. Because this Delete and Replace feature effectively changes the settings of elements or attributes affected by the attribute that is being replaced, you must FIRST reserve all elements and attributes which may be affected.
Failing to do so will result in missing surfaces in your elements settings, missing fills in the model and plan as well as the attributes which were using those fills. The best practice would be to reserve all before cleaning up attributes.