How to simulate system error msgs on 48?

[HP67]

Hi and thanks for looking into this. Sorry for not giving an example or a better explanation earlier.

Errors from the system words appear with the name of the command as part of the error text, for example

Code:

1 HEAD

produces

Code:

HEAD Error:
Bad argument type

But

Code:

# 202h DOERR

produces

Code:

Error:
Bad argument type

I don't know how to get the command name to appear before the "Error:" literal.

I want to be able to implement all the same effects as a system error message. I want the command name to appear in the error message, and I believe I'll have to use DOERR so ERRN and ERRM are set so the replacement words I'm working on back-porting all produce identical results as the GX words they're meant to replace.