Can not change instance in schematic view

The foundry will have intentionally disabled the cell name field here because potentially the properties may not get correctly reset if you re-master the instance by changing the cell name. This is because if there are already properties on the instance, then changing the instance here will keep the original properties which may not make sense for the destination device/cell - and they might be inconsistent (for example, the SA/SB etc will probably be computed via a callback, and that might be different for the alternative device. That might not necessarily be the case, but it is often an issue when substituting one transistor for another).

So you will need to delete the instance and reinstantiate the new instance.

Andrew

Thank you , Andrew,  for pointing that out. Initially, the TSMC instance name was editable . For instance, if I had an array of the same device, I could modify all of them simultaneously by selecting all and choosing the new instance. However, unintentional changes might have been made, rendering it uneditable. Despite this, I attempted to access the same libraries from a different directory, essentially starting Virtuoso from a different location. This approach proved successful, allowing me to switch instances seamlessly. However, when I open it from the original directory where the issue occurred, it remains uneditable, specifically for TSMC instances.

Another thing is, after deleting an instance and adding a new one, I couldn't switch to a different instance without having to delete and add each one separately, redoing the wiring of each instance

Thank you , Andrew,  for pointing that out. Initially, the TSMC instance name was editable . For instance, if I had an array of the same device, I could modify all of them simultaneously by selecting all and choosing the new instance. However, unintentional changes might have been made, rendering it uneditable. Despite this, I attempted to access the same libraries from a different directory, essentially starting Virtuoso from a different location. This approach proved successful, allowing me to switch instances seamlessly. However, when I open it from the original directory where the issue occurred, it remains uneditable, specifically for TSMC instances.

Another thing is, after deleting an instance and adding a new one, I couldn't switch to a different instance without having to delete and add each one separately, redoing the wiring of each instance