Unbound pin

用ASSURE做LVS验证时，提示"Unbound pin"我检查过电路原理图与版图中pin都一致，为什么会提示这个错误呢，Unbound pin 是什么意思呢? 求教各位了！

meaning you have some pins that are floating or not connected or maybe you don't pin them yet. check netlist

可是我检查过PIN连上了呀，金属层上面加METALTXT，再加PIN。还有就是某一电容值，原理图与版图中宽、长的设置都相应一致，但是LVS检查后给出原理图与版图中该电容的值MISMATCH，不知是怎么回事啊。