[O] problem with babel call with post action

[Eric S Fraga]

Hello,

the following single line command (may be wrapped in email) used to work
a while back (maybe last year?):

  #+call: 
graph-from-tables(options="rankdir=LR;",nodes=subtasks-table[2:-1],graph=dependency-table[2:-1])
 :exports results :results file :post plot-graph[:results file :exports results 
:file dependency-graph.pdf](graph=*this*)

This now gives this error message if I evaluate it:

  org-babel-ref-resolve: Reference ‘file dependency-graph.pdf](graph=*this*’ 
not found in this buffer

I've tried this with an up to date org (on another system) with same
outcome.  I have not yet tried emacs -Q.

For background, this call is to an elisp code block which converts two
tables describing a task network into dot/graphviz code which is then
fed to a skeleton dot code block.

I can post codes if required but I think the problem is with the actual
call line somehow.  Some change to links along the way?  Any suggestions
most welcome!

Thanks,
eric

-- 
: Eric S Fraga via Emacs 26.0.50, Org release_9.0.7-531-g530113

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