Error Handling

[whattaz13]

I'm looking for a some error handling. With a little luck and a lot of help from other peoples posts I got my list routine to work. Now that it's working I would like to add some error handling on not allowing xrefs to attach more that once. They attach fine but if I accidently attach one again it errors out. If any one could help that would be greatly appreciated. See attachment for the code...Thanks

[Adesu]

Hi whattaz,
Do you mean error handling code like this

(defun c:test (/ *error* om otm opt)
  (setq *error* myer)
  (setq om (getvar "xxx"))  
  (setvar "xxx" 0)
  (setq otm (getvar "yyy"))
  (setvar "yyy" 1)

  (setq opt (getstring t "\nPress Esc button to test error: "))
  ;*****PUT YOUR MAIN CODE HERE *******
  
  (setvar "xxx" om)
  (setvar "yyy" otm)
  (setq *error* nil)
  (princ)
  )

(defun myer (msg)
  (setvar "xxx" om)
  (setvar "yyy" otm)
  (setq att "*** Resetting system variable has been done ***")
  (princ att)
  )

I'm looking for a some error handling. With a little luck and a lot of help from other peoples posts I got my list routine to work. Now that it's working I would like to add some error handling on not allowing xrefs to attach more that once. They attach fine but if I accidently attach one again it errors out. If any one could help that would be greatly appreciated. See attachment for the code...Thanks

[whattaz13]

Thanks Adesu, I might not fully understand you code. But I don't think that's it. If you look at my lsp code under the refnew command for example. That's where my error happens when I'm renaming the xref. I would like to detach the duplicated xref and then continue w/ the code.