Incomplete final bar with \parallelMusic

[David Sumbler]

I am using the \parallelMusic entry for a string quartet.

At the beginning of the 1st movement (which is mostly in 4/4 time) there
is a half bar before the first bar-line, which causes no problem because
I have "\partial 2" in each part.

But the corresponding half bar at the end of the movement produces
"barcheck failed" warning messages, although the music compiles
correctly.  The final bar and a half are these:

% bar 148
        d2 r2 |
        d2 r2 |
        d2 r8 cs cs cs |
        d2 r8 cs cs cs |
% bar 149
        d4 r4 \bar "|."
        d4 r4 \bar "|."
        d4 r4 \bar "|."
        d4 r4 \bar "|."

So far I haven't found a way to suppress these messages, although I have
tried several different approaches.  I suspect that there is probably a
fairly simple solution, but so far I haven't managed to think of it!

Any ideas?

David