Is there any way of catching an error...

[Dustydog]

...for things like cancelling out of an interactive rename within a script? Without completely working around it?

I hope this isn't a rtfm situation.

[highend]

And your code for an "interactive rename" is?

[Dustydog]

Unless I'm getting around it with an input statement for a single rename, I'm just using the most basic possible:

rename b, "$renameTo", p;

I find his preview feature quite convenient. it gives a nicely formatted and width-appropriate last chance with the possibility of using bulk rename syntax to add something to the front or back instead of accepting the entire calculated rename. Suppose I could always just rename to * without cancelling, which for a lack of a better word seems untidy, but that's beyond the scope. (Eventually I'll probably use an edit filenames box, but I'm not there yet as what I'm doing is pretty convoluted and somewhat interactive.)

Was simply curious in general if there was any way of doing an: OnError {Do This;}.

I assume, "No." But thought I'd ask.

[highend]

Because that command has no return value, the only way to check would be by
comparing the before / after names

So:

OnError {Do This;}

No, not in a general way...