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diff --git a/pkg/tbtables/fitsio/ftgiou.f b/pkg/tbtables/fitsio/ftgiou.f
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+C------------------------------------------------------------------------------
+ subroutine ftgiou(iounit,status)
+
+C get an unallocated logical unit number
+
+ integer iounit,status
+
+ if (status .gt. 0)return
+ iounit=0
+ call ftxiou(iounit,status)
+ end