关于R的sem包的问题，我做了以下这个模型后，使用sem包，运行了20分钟左右提示说无法计算QR，不知道是怎么回事，难道我的输入的模型不对吗？请高手解答呵，不胜感激！
Fmodel.job <- specifyModel()
SCH -> a1, lam1, NA
SCH -> a2, lam2, NA
SCH -> a3, lam3, NA
DEC -> a4, lam4, NA
DEC -> a5, lam5, NA
DEC -> a6, lam6, NA
MET -> a7, lam7, NA
MET -> a8, lam8, NA
MET -> a9, lam9, NA
VAR -> a10, lam10, NA
VAR -> a11, lam11, NA
VAR -> a12, lam12, NA
VAR -> a13, lam13, NA
SIG -> a14, lam14, NA
SIG -> a15, lam15, NA
SIG -> a16, lam16, NA
SIG -> a17, lam17, NA
IDE -> a18, lam18, NA
IDE -> a19, lam19, NA
IDE -> a20, lam20, NA
IDE -> a21, lam21, NA
FEE -> a22, lam22, NA
FEE -> X.a23, lam23, NA
FEE -> a24, lam24, NA
COM -> a25, lam25, NA
COM -> a26, lam26, NA
COM -> a27, lam27, NA
COM -> a28, lam28, NA
INF -> a29, lam29, NA
INF -> a30, lam30, NA
INF -> a31, lam31, NA
INF -> a32, lam32, NA
PRO -> a33, lam33, NA
PRO -> a34, lam34, NA
PRO -> a35, lam35, NA
PRO -> a36, lam36, NA
SKI -> a37, lam37, NA
SKI -> a38, lam38, NA
SKI -> a39, lam39, NA
SKI -> a40, lam40, NA
SPE -> a41, lam41, NA
SPE -> a42, lam42, NA
SPE -> a43, lam43, NA
SPE -> a44, lam44, NA
SOC -> a45, lam45, NA
SOC -> X.a46, lam46, NA
SOC -> a47, lam47, NA
SOC -> a48, lam48, NA
SOC -> a49, lam49, NA
SOC -> a50, lam50, NA
INT -> a51, lam51, NA
INT -> a52, lam52, NA
INT -> a53, lam53, NA
ACC -> a54, lam54, NA
ACC -> a55, lam55, NA
ACC -> a56, lam56, NA
ORG -> a57, lam57, NA
ORG -> a58, lam58, NA
ORG -> a59, lam59, NA
ORG -> a60, lam60, NA
OTH -> a61, lam61, NA
OTH -> a62, lam62, NA
OTH -> a63, lam63, NA
ERG -> a64, lam64, NA
ERG -> a65, lam65, NA
ERG -> a66, lam66, NA
PHY -> a67, lam67, NA
PHY -> a68, lam68, NA
PHY -> X.a69, lam69, NA
CON -> a70, lam70, NA
CON -> a71, lam71, NA
CON -> a72, lam72, NA
CON -> a73, lam73, NA
CON -> a74, lam74, NA
EQU -> a75, lam75, NA
EQU -> a76, lam76, NA
EQU -> a77, lam77, NA
a1 <-> a1, TD1, NA
a2 <-> a2, TD2, NA
a3 <-> a3, TD3, NA
a4 <-> a4, TD4, NA
a5 <-> a5, TD5, NA
a6 <-> a6, TD6, NA
a7 <-> a7, TD7, NA
a8 <-> a8, TD8, NA
a9 <-> a9, TD9, NA
a10 <-> a10, TD10, NA
a11 <-> a11, TD11, NA
a12 <-> a12, TD12, NA
a13 <-> a13, TD13, NA
a14 <-> a14, TD14, NA
a15 <-> a15, TD15, NA
a16 <-> a16, TD16, NA
a17 <-> a17, TD17, NA
a18 <-> a18, TD18, NA
a19 <-> a19, TD19, NA
a20 <-> a20, TD20, NA
a21 <-> a21, TD21, NA
a22 <-> a22, TD22, NA
X.a23 <-> X.a23, TD23, NA
a24 <-> a24, TD24, NA
a25 <-> a25, TD25, NA
a26 <-> a26, TD26, NA
a27 <-> a27, TD27, NA
a28 <-> a28, TD28, NA
a29 <-> a29, TD29, NA
a30 <-> a30, TD30, NA
a31 <-> a31, TD31, NA
a32 <-> a32, TD32, NA
a33 <-> a33, TD33, NA
a34 <-> a34, TD34, NA
a35 <-> a35, TD35, NA
a36 <-> a36, TD36, NA
a37 <-> a37, TD37, NA
a38 <-> a38, TD38, NA
a39 <-> a39, TD39, NA
a40 <-> a40, TD40, NA
a41 <-> a41, TD41, NA
a42 <-> a42, TD42, NA
a43 <-> a43, TD43, NA
a44 <-> a44, TD44, NA
a45 <-> a45, TD45, NA
X.a46 <-> X.a46, TD46, NA
a47 <-> a47, TD47, NA
a48 <-> a48, TD48, NA
a49 <-> a49, TD49, NA
a50 <-> a50, TD50, NA
a51 <-> a51, TD51, NA
a52 <-> a52, TD52, NA
a53 <-> a53, TD53, NA
a54 <-> a54, TD54, NA
a55 <-> a55, TD55, NA
a56 <-> a56, TD56, NA
a57 <-> a57, TD57, NA
a58 <-> a58, TD58, NA
a59 <-> a59, TD59, NA
a60 <-> a60, TD60, NA
a61 <-> a61, TD61, NA
a62 <-> a62, TD62, NA
a63 <-> a63, TD63, NA
a64 <-> a64, TD64, NA
a65 <-> a65, TD65, NA
a66 <-> a66, TD66, NA
a67 <-> a67, TD67, NA
a68 <-> a68, TD68, NA
X.a69 <-> X.a69, TD69, NA
a70 <-> a70, TD70, NA
a71 <-> a71, TD71, NA
a72 <-> a72, TD72, NA
a73 <-> a73, TD73, NA
a74 <-> a74, TD74, NA
a75 <-> a75, TD75, NA
a76 <-> a76, TD76, NA
a77 <-> a77, TD77, NA
SCH <-> SCH, NA, 1
DEC <-> DEC, NA, 1
MET <-> MET, NA, 1
VAR <-> VAR, NA, 1
SIG <-> SIG, NA, 1
IDE <-> IDE, NA, 1
FEE <-> FEE, NA, 1
COM <-> COM, NA, 1
INF <-> INF, NA, 1
PRO <-> PRO, NA, 1
SKI <-> SKI, NA, 1
SPE <-> SPE, NA, 1
SOC <-> SOC, NA, 1
INT <-> INT, NA, 1
ACC <-> ACC, NA, 1
ORG <-> ORG, NA, 1
OTH <-> OTH, NA, 1
ERG <-> ERG, NA, 1
PHY <-> PHY, NA, 1
CON <-> CON, NA, 1
EQU <-> EQU, NA, 1
SCH <-> DEC, Be12, NA
SCH <-> MET, Be13, NA
SCH <-> VAR, Be14, NA
SCH <-> SIG, Be15, NA
SCH <-> IDE, Be16, NA
SCH <-> FEE, Be17, NA
SCH <-> COM, Be18, NA
SCH <-> INF, Be19, NA
SCH <-> PRO, Be110, NA
SCH <-> SKI, Be111, NA
SCH <-> SPE, Be112, NA
SCH <-> SOC, Be113, NA
SCH <-> INT, Be114, NA
SCH <-> ACC, Be115, NA
SCH <-> ORG, Be116, NA
SCH <-> OTH, Be117, NA
SCH <-> ERG, Be118, NA
SCH <-> PHY, Be119, NA
SCH <-> CON, Be120, NA
SCH <-> EQU, Be121, NA
DEC <-> MET, Be23, NA
DEC <-> VAR, Be24, NA
DEC <-> SIG, Be25, NA
DEC <-> IDE, Be26, NA
DEC <-> FEE, Be27, NA
DEC <-> COM, Be28, NA
DEC <-> INF, Be29, NA
DEC <-> PRO, Be210, NA
DEC <-> SKI, Be211, NA
DEC <-> SPE, Be212, NA
DEC <-> SOC, Be213, NA
DEC <-> INT, Be214, NA
DEC <-> ACC, Be215, NA
DEC <-> ORG, Be216, NA
DEC <-> OTH, Be217, NA
DEC <-> ERG, Be218, NA
DEC <-> PHY, Be219, NA
DEC <-> CON, Be220, NA
DEC <-> EQU, Be221, NA
MET <-> VAR, Be34, NA
MET <-> SIG, Be35, NA
MET <-> IDE, Be36, NA
MET <-> FEE, Be37, NA
MET <-> COM, Be38, NA
MET <-> INF, Be39, NA
MET <-> PRO, Be310, NA
MET <-> SKI, Be311, NA
MET <-> SPE, Be312, NA
MET <-> SOC, Be313, NA
MET <-> INT, Be314, NA
MET <-> ACC, Be315, NA
MET <-> ORG, Be316, NA
MET <-> OTH, Be317, NA
MET <-> ERG, Be318, NA
MET <-> PHY, Be319, NA
MET <-> CON, Be320, NA
MET <-> EQU, Be321, NA
VAR <-> SIG, Be45, NA
VAR <-> IDE, Be46, NA
VAR <-> FEE, Be47, NA
VAR <-> COM, Be48, NA
VAR <-> INF, Be49, NA
VAR <-> PRO, Be410, NA
VAR <-> SKI, Be411, NA
VAR <-> SPE, Be412, NA
VAR <-> SOC, Be413, NA
VAR <-> INT, Be414, NA
VAR <-> ACC, Be415, NA
VAR <-> ORG, Be416, NA
VAR <-> OTH, Be417, NA
VAR <-> ERG, Be418, NA
VAR <-> PHY, Be419, NA
VAR <-> CON, Be420, NA
VAR <-> EQU, Be421, NA
SIG <-> IDE, Be56, NA
SIG <-> FEE, Be57, NA
SIG <-> COM, Be58, NA
SIG <-> INF, Be59, NA
SIG <-> PRO, Be510, NA
SIG <-> SKI, Be511, NA
SIG <-> SPE, Be512, NA
SIG <-> SOC, Be513, NA
SIG <-> INT, Be514, NA
SIG <-> ACC, Be515, NA
SIG <-> ORG, Be516, NA
SIG <-> OTH, Be517, NA
SIG <-> ERG, Be518, NA
SIG <-> PHY, Be519, NA
SIG <-> CON, Be520, NA
SIG <-> EQU, Be521, NA
IDE <-> FEE, Be67, NA
IDE <-> COM, Be68, NA
IDE <-> INF, Be69, NA
IDE <-> PRO, Be610, NA
IDE <-> SKI, Be611, NA
IDE <-> SPE, Be612, NA
IDE <-> SOC, Be613, NA
IDE <-> INT, Be614, NA
IDE <-> ACC, Be615, NA
IDE <-> ORG, Be616, NA
IDE <-> OTH, Be617, NA
IDE <-> ERG, Be618, NA
IDE <-> PHY, Be619, NA
IDE <-> CON, Be620, NA
IDE <-> EQU, Be621, NA
FEE <-> COM, Be78, NA
FEE <-> INF, Be79, NA
FEE <-> PRO, Be710, NA
FEE <-> SKI, Be711, NA
FEE <-> SPE, Be712, NA
FEE <-> SOC, Be713, NA
FEE <-> INT, Be714, NA
FEE <-> ACC, Be715, NA
FEE <-> ORG, Be716, NA
FEE <-> OTH, Be717, NA
FEE <-> ERG, Be718, NA
FEE <-> PHY, Be719, NA
FEE <-> CON, Be720, NA
FEE <-> EQU, Be721, NA
COM <-> INF, Be89, NA
COM <-> PRO, Be810, NA
COM <-> SKI, Be811, NA
COM <-> SPE, Be812, NA
COM <-> SOC, Be813, NA
COM <-> INT, Be814, NA
COM <-> ACC, Be815, NA
COM <-> ORG, Be816, NA
COM <-> OTH, Be817, NA
COM <-> ERG, Be818, NA
COM <-> PHY, Be819, NA
COM <-> CON, Be820, NA
COM <-> EQU, Be821, NA
INF <-> PRO, Be910, NA
INF <-> SKI, Be911, NA
INF <-> SPE, Be912, NA
INF <-> SOC, Be913, NA
INF <-> INT, Be914, NA
INF <-> ACC, Be915, NA
INF <-> ORG, Be916, NA
INF <-> OTH, Be917, NA
INF <-> ERG, Be918, NA
INF <-> PHY, Be919, NA
INF <-> CON, Be920, NA
INF <-> EQU, Be921, NA
PRO <-> SKI, Be1011, NA
PRO <-> SPE, Be1012, NA
PRO <-> SOC, Be1013, NA
PRO <-> INT, Be1014, NA
PRO <-> ACC, Be1015, NA
PRO <-> ORG, Be1016, NA
PRO <-> OTH, Be1017, NA
PRO <-> ERG, Be1018, NA
PRO <-> PHY, Be1019, NA
PRO <-> CON, Be1020, NA
PRO <-> EQU, Be1021, NA
SKI <-> SPE, Be1112, NA
SKI <-> SOC, Be1113, NA
SKI <-> INT, Be1114, NA
SKI <-> ACC, Be1115, NA
SKI <-> ORG, Be1116, NA
SKI <-> OTH, Be1117, NA
SKI <-> ERG, Be1118, NA
SKI <-> PHY, Be1119, NA
SKI <-> CON, Be1120, NA
SKI <-> EQU, Be1121, NA
SPE <-> SOC, Be1213, NA
SPE <-> INT, Be1214, NA
SPE <-> ACC, Be1215, NA
SPE <-> ORG, Be1216, NA
SPE <-> OTH, Be1217, NA
SPE <-> ERG, Be1218, NA
SPE <-> PHY, Be1219, NA
SPE <-> CON, Be1220, NA
SPE <-> EQU, Be1221, NA
SOC <-> INT, Be1314, NA
SOC <-> ACC, Be1315, NA
SOC <-> ORG, Be1316, NA
SOC <-> OTH, Be1317, NA
SOC <-> ERG, Be1318, NA
SOC <-> PHY, Be1319, NA
SOC <-> CON, Be1320, NA
SOC <-> EQU, Be1321, NA
INT <-> ACC, Be1415, NA
INT <-> ORG, Be1416, NA
INT <-> OTH, Be1417, NA
INT <-> ERG, Be1418, NA
INT <-> PHY, Be1419, NA
INT <-> CON, Be1420, NA
INT <-> EQU, Be1421, NA
ACC <-> ORG, Be1516, NA
ACC <-> OTH, Be1517, NA
ACC <-> ERG, Be1518, NA
ACC <-> PHY, Be1519, NA
ACC <-> CON, Be1520, NA
ACC <-> EQU, Be1521, NA
ORG <-> OTH, Be1617, NA
ORG <-> ERG, Be1618, NA
ORG <-> PHY, Be1619, NA
ORG <-> CON, Be1620, NA
ORG <-> EQU, Be1621, NA
OTH <-> ERG, Be1718, NA
OTH <-> PHY, Be1719, NA
OTH <-> CON, Be1720, NA
OTH <-> EQU, Be1721, NA
ERG <-> PHY, Be1819, NA
ERG <-> CON, Be1820, NA
ERG <-> EQU, Be1821, NA
PHY <-> CON, Be1920, NA
PHY <-> EQU, Be1921, NA
CON <-> EQU, Be2021, NA