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diff --git a/pkg/utilities/nttools/trebin/tnamgio.x b/pkg/utilities/nttools/trebin/tnamgio.x
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+++ b/pkg/utilities/nttools/trebin/tnamgio.x
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+# tnam_gio -- get input & output names
+# Get the next input and output table names.
+#
+# Phil Hodge, 15-Apr-1988  Task created.
+# Phil Hodge,  4-Oct-1995  Modify to use tbn instead of fnt; use tbparse.
+# Phil hodge, 16-Apr-1999  Remove ttype from calling sequence of tbparse.
+# Phil Hodge, 25-Apr-2000  Add xin_t, xtable, maxch to calling sequence,
+#			and remove dir_only.
+
+int procedure tnam_gio (in_t, xin_t, out_t, outdir,
+			intable, xtable, outtable, maxch)
+
+pointer in_t			# i: fnt pointer for input tables
+pointer xin_t			# i: fnt pointer for tables of output X
+pointer out_t			# i: fnt pointer for output tables
+char	outdir[ARB]		# i: name of output directory
+char	intable[ARB]		# o: name of next input table
+char	xtable[ARB]		# o: name of next table for output X
+char	outtable[ARB]		# o: name of next output table
+int	maxch			# i: size of table name strings
+#--
+pointer sp
+pointer filename		# name of table file, without brackets
+pointer scratch
+int	nchar			# value of tbnget for intable
+int	junk, hdu, tbparse()
+int	dir_len			# length of root portion of table name
+int	tbnget(), tbnlen(), fnldir()
+errchk	tbparse
+
+begin
+	# Get the next input table name.
+	nchar = tbnget (in_t, intable, SZ_LINE)
+	if (nchar == EOF)
+	    return (EOF)
+
+	# Get the next table for output independent variable values.
+	if (xin_t != NULL) {
+	    if (tbnlen (xin_t) == 1)		# only one xtable?
+		call tbnrew (xin_t)
+	    if (tbnget (xin_t, xtable, SZ_LINE) == EOF)
+		return (EOF)
+	} else {
+	    xtable[1] = EOS
+	}
+
+	if (out_t != NULL) {
+
+	    # Get the next output table name.
+	    if (tbnget (out_t, outtable, SZ_LINE) == EOF)
+		return (EOF)
+
+	} else {		# output is a directory name
+
+	    call smark (sp)
+	    call salloc (filename, SZ_LINE, TY_CHAR)
+	    call salloc (scratch, SZ_LINE, TY_CHAR)
+
+	    # Copy the portion of the table name without brackets to
+	    # Memc[filename]; we need to get rid of the brackets because
+	    # they confuse fnldir.
+	    junk = tbparse (intable, Memc[filename], Memc[scratch],
+			SZ_LINE, hdu)
+
+	    # Get the length of the directory prefix.
+	    dir_len = fnldir (Memc[filename], Memc[scratch], SZ_LINE)
+
+	    # Copy the output directory name to outtable.
+	    call strcpy (outdir, outtable, SZ_LINE)
+
+	    # Append the name of the input file (without directory prefix
+	    # and without any bracket suffix) to the output directory.
+	    call strcat (Memc[filename+dir_len], outtable, SZ_LINE)
+
+	    call sfree (sp)
+	}
+
+	return (nchar)
+end