I know this post is a few months old now, but I have a strikingly similar
setup and am getting a similar, somewhat more reliable error:
ERROR: could not open file "base/29292/12186914_fsm": Invalid argument
It happens while doing an ST_Difference() function on two large geometries.
I'm running OSX 10.8 (Mountain Lion)
Postgresql 9.4.1
PostGIS 2.0.1
It's failing repeatedly for me right now, so at the moment it's a hard fail.
That said, just last week, with the same database, same command but
different table, I got this slightly different error:
ERROR: could not open file "base/29292/49722_fsm": Invalid argument
THAT error, however, cleared up mysteriously after I shut down and
restarted. (I haven't been able to get tonight's error to clear up in the
same way.)
What other information can I provide to help track squash this bug?
Thanks,
John
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