For joining cartridges and furnace inserts two dialogs have been implemented:
Labels
Specific labels assigned in the Labels dialog are a prerequisite for joining cartridges and furnace inserts in SQF configurations, see Assigning labels.
Joiner
In the Joiner dialog cartridges and furnace inserts to be joined are selected and joined to form the final simulation model, see Joining cartridge and furnace insert. Because cartridge and furnace insert files are *.crys files, the Joiner dialog is available in Simulation Mode only.
The joiner facility is a specific application which merges two CAD models together. It utilizes the labels. Usually labels are not required in the work-flow of CrysMAS.