Change NetName

You won't be able to change the name of a net in Capture, that's not even possible through the UI. Net Names get overridden with Net Aliases, you should be able change a Net Alias using an AliasIter on DboWire to scan the Aliases and the DboAlias object.

Thanks for your reply but what I actually want to do is to replace the name of a net by its corresponding pin name. I've already mentioned that I am able to change the names of OffPageConnectors of the whole pages. But I just want to pick a particular part and than get the pin name of every pin of that part and than replace the respective nets of those pins. Can we have Pin Name and Net Name through DboWire? The problem is still there,we can not have lWire of any particular part as we can have wires of complete page.

These are the commands i am using :- 

set pinName [DboTclHelper_sMakeCString];

set NetName [DboTclHelper_sMakeCString];

set NetName [DboPortInst_sGetNetName $lPin $lStatus];

DboPortInst_GetPinName $lPin $pinName

set pinName [DboTclHelper_sGetConstCharPtr $pinName];

set NetName [DboTclHelper_sGetConstCharPtr $NetName];

Now here we can set pin name by  

DboPortInst_SetPinName $lPin "PinChanged" 

but couldn't change NetName as it includes $lStatus instead of $NetName as arguments.  

I hope you understand my problem now. 

I don't think that you have appreciated the way that the net name works. The name for a DboWire is assigned by Capture, N<some sequence number> is assigned and that is the Name of the Wire in the Capture DSN data, this can be overridden with a Net Alias, for example; more strictly a "higher order object": Net Alias, or Off-Page Connector, or Hierarchical Port. If the "higher order object(s)" are removed the net will revert to the original, Capture assigned, name. Since you have changed the Port name, the net name in the generated netlist will adopt that, or the highest level the net is named.

As an aside, if you are doing this for the whole design, how is Net<something> / Pin<somthing else> ever going to connect through the design? Since it seems unlikely that a net of a given name is always going to be connected to a pin of the same number.

I do a similar task of correction part pin net in the schematic  accordance Altera pin file. There is some implementation github.com/.../pin2part.git