Where used

hi,

when i select a part in solidworks explorer and say where used itdid not show the all level of assembly.

suppose i have a part named arm. which is used in robot. and therobot assembly again used gadget assembly.

so when i select the arm it should show all level assembly as robot& gadget.

i have select all level assembly in where used option. where i ammissing something.

please help....

SolidworksSolidworks Explorer