better error msg for ambiguous (de)crescendo?

[Mark Polesky]

I want to change this:
  "programming error: (de)crescendo on items with specified volume."

Here are my candidates:
  "warning: impossible or ambiguous (de)crescendo."
  "warning: impossible or ambiguous (de)crescendo (MIDI)."
  "warning: ignoring impossible or ambiguous (de)crescendo."
  "warning: ignoring impossible or ambiguous (de)crescendo (MIDI)."
  "warning: MIDI found an impossible or ambiguous (de)crescendo."
  "warning: MIDI is ignoring an impossible or ambiguous (de)crescendo."

Anyone care to vote, suggest an alternative, or express
an opposition to this idea?

- Mark