The title doesn't justify my issue but I'll explain.
The reactor routine works fine if I double clicked on paper space then double clicked on a view port then double click on a different viewport. However, if I switched between viewports without switching to paperspace first, i get this error.
Command: ; error: AutoCAD variable setting rejected: "dimscale" 40.0
; error: AutoCAD variable setting rejected: "dimscale" 10.0
; error: AutoCAD variable setting rejected: "dimscale" 40.0
; reactor
(defun VPActivated_OnLoad ()
(if *VPActivated_SysVarReactor*
(vlr-remove *VPActivated_SysVarReactor*))
(setq *VPActivated_sysVarReactor* (vlr-sysvar-reactor
nil
'((:vlr-sysVarChanged . VPActivated_CallBack))))
(princ "\nVPActivated is running")
)
;callback
(defun VPActivated_CallBack (rea lst /)
(if (and (= (car lst) "CVPORT")
(>= (getvar "CVPORT") 2)
)
(setvar "dimscale" (/ 1.0 (getvar "CANNOSCALEVALUE"))))
)
; load
(VPActivated_OnLoad)
; unload function
(defun c:VPActivated_UnLoad ()
(if *VPActivated_SysVarReactor*
(vlr-remove *VPActivated_SysVarReactor*))
(princ)
)