A family member is only adaptable from within the template, so if you open the part you will notice that it is Read-Only. Visible in the top bar of your NX screen.
Best regards,
Michaël.
NX7.5.4.4 + TC Unified 8.3
Win 7 64 bit (Intel(R) Xeon(R) CPU X5650 @2.67GHz)
24.0 GB
NVIDIA Quadro 4000 + NVIDIA Tesla C2050