Wanted to import the Library of Congress record for my Webster’s dictionary. It failed with an obscure message (notices invalides). Looking at the code, this could be caused by a missing title statement (UNIMARC tag $200a). And indeed upon inspection the title is in MARC zone $245:

00953cam a2200253 a 4500
001 4715262
005 20140505111109.0
008 831102s1984    nyuaf    d    000 0 eng
906    $a 7 $b cbc $c orignew $d 1 $e ocip $f 19 $g y-gencatlg
010    $a    83020232
020    $a 0671418149
035    $9 (DLC)   83020232
040    $a DLC $c DLC $d DLC
050 00 $a PE1625 $b .W34 1984b
082 00 $a 423 $2 19
245 00 $a Webster's New World dictionary of the American language / $c David B. Guralnik, editor in chief.
250    $a 2nd college ed.
260    $a New York, N.Y. : $b Simon and Schuster, $c c1984.
300    $a xxxvi, 1692 p., [36] p. of plates : $b ill. (some col.) ; $c 29 cm.
650  0 $a English language $z United States $x Dictionaries.
650  0 $a Americanisms $x Dictionaries.
700 1  $a Guralnik, David B. $q (David Bernard), $d 1920-2000.
991    $b c-GenColl $h PE1625 $i .W34 1984b $t Copy 1 $w BOOKS
991    $b c-GenColl $h PE1625 $i .W34 1984b $p 00017698631 $t Copy 2 $w CCF

Turns out that the LoC notice is in MARC21 format, whereas PMB expects UNIMARC. So I used MarcEdit to convert MARC21 to UNIMARC and was able to import.

Conversion process: Tools > UNIMARC Tools > MARC21=>UNIMARC

00812  22a22002415  450
001 4715262
005 20140505111109.0
100    $a 19831102s1984    u||y0   y        0
105    $a         000|y
106    $a y
110    $a zkue   0|||
010    $a 0671418149
200 0  $a Webster's New World dictionary of the American language / $f David B. Guralnik, editor in chief.
205    $a 2nd college ed.
210    $a New York, N.Y. : $c Simon and Schuster, $d c1984.
215 1  $a xxxvi, 1692 p., [36] p. of plates : $c ill. (some col.) ; $d 29 cm.
606    $a English language $x Dictionaries. $y United States
606    $a Americanisms $x Dictionaries.
676    $a 423 $v 19
680    $a PE1625 $b .W34 1984b
701    $a Guralnik $b David B. $f 1920-2000. $g (David Bernard),
721    $a Guralnik, David B. $f 1920-2000.
802    $a zz