mode in dd trigger 'preObjAccess'?

[Fergus_S]

If I define and register a procedure for the dd preObjAccess trigger:

procedure(myPreObjAccess(lib cell view file contextId mode )
printf("lib:%L cell:%L view:%L file:%L contextId:%L mode:%L\n"
lib cell view file contextId mode )
); procedure myPreObjAccess
ddRegTrigger( "preObjAccess" 'myPreObjAccess )

and open an existing cellview for edit:

cvId = dbOpenCellViewByType("myLib" "myCell" "layout" "" "a")

I expect myPreObjAccess to be called with mode "a", but it prints:

lib:"myLib" cell:"myCell" view:"layout" file:"layout.cdb"
contextId:nil mode:"r"

So my question is - why is preObjAccess being called with mode "r" and
not "a"?
Can I change that behaviour?

Thanks,

fergus