pg_restore -m failing

hi all,

After Andrew corrected the bug I found on pg_restore (-C -m misbehaving 
one with the other), I played again yesterday.

before the end of restore, I get this :

pg_restore: launching item 4202 INDEX idx_typeper_actif
pg_restore: [custom archiver] could not close archive file: Argument 
incorrect
pg_restore: *** aborted because of error
pg_restore: finished item 4202 INDEX idx_typeper_actif
pg_restore: [archiver] worker process failed: exit code 1
pg_restore: *** aborted because of error

Any idea? this is on unixware

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