>I was able to reproduce this error. You can see it on out Development server (https://admap-dev.ittm-solutions.com/minerva/index.xhtml?id=Get_Null_Error_reproduction) but I have also attached the xml file. The reason was that I removed the name of the box after creating it (here the box is cellular compartment symbol). That means I left the cellular compartment without name. by Erfan [Get_Null_Error_reproduction.xml](/uploads/74985f694c4c535413344338a7ed4db2/Get_Null_Error_reproduction.xml)