硕士论文用AMOS软件做路径系数，图也画好了，数据也导入了，可是点击estimation，没有反应，text output中写Notes for Model (Default model)
Computation of degrees of freedom (Default model)

Number of distinct sample moments:	91
Number of distinct parameters to be estimated:	41
Degrees of freedom (91 - 41):	50

Result (Default model)
The model is probably unidentified. In order to achieve identifiability, it will probably be necessary to impose 7 additional constraints.
请问是怎么一回事？急需高手解答！！！


Group number 1 (Group number 1 - Default model)
Estimates (Group number 1 - Default model)
Scalar Estimates (Group number 1 - Default model)
The (probably) unidentified parameters are marked.
Regression Weights: (Group number 1 - Default model)

产业结构升级

<---

产业创新率

产业结构升级

<---

Z4

unidentified

技术进步

<---

产业创新率

unidentified

外贸结构优化

<---

产业结构升级

unidentified

外贸结构优化

<---

Z5

unidentified

外贸结构优化

<---

产业成长速度

unidentified

经济增长

<---

产业创新率

unidentified

经济增长

<---

产业结构升级

unidentified

经济增长

<---

技术进步

unidentified

经济增长

<---

外贸结构优化

unidentified

经济增长

<---

Z6

unidentified

经济增长

<---

产业成长速度

unidentified

M43

<---

产业结构升级

M42

<---

产业结构升级

M41

<---

产业结构升级

M51

<---

外贸结构优化

M52

<---

外贸结构优化

M53

<---

外贸结构优化

unidentified

M6

<---

经济增长

unidentified

M3

<---

技术进步

unidentified

M11

<---

产业创新率

M12

<---

产业创新率

M13

<---

产业创新率

M14

<---

产业创新率

M2

<---

产业成长速度

Covariances: (Group number 1 - Default model)

产业创新率

<-->

产业成长速度

unidentified

Variances: (Group number 1 - Default model)

产业创新率

unidentified

Z5

unidentified

Z4

unidentified

Z6

unidentified

产业成长速度

Z3

unidentified

Z43

Z42

Z41

Z51

Z52

Z53

Z61

unidentified

Z31

unidentified

Z11

Z12

Z13

Z14

Z2

Minimization History (Default model)IterationNegative
eigenvalues
Condition #Smallest
eigenvalue
DiameterFNTriesRatio
0

e

13-.5889999.0002630.59409999.000
1

e*

11-1.1702.2802275.43020.433


Model Fit Summary
CMIN

Model

NPARCMINDFPCMIN/DF

Saturated model

91.0000

Independence model

132618.22378.00033.567
RMR, GFI

Model

RMRGFIAGFIPGFI

Saturated model

.0001.000

Independence model

1161318752.911.351.243.301
Baseline Comparisons

Model

NFI
Delta1
RFI
rho1
IFI
Delta2
TLI
rho2
CFI

Saturated model

1.0001.0001.000

Independence model

.000.000.000.000.000
Parsimony-Adjusted Measures

Model

PRATIOPNFIPCFI

Saturated model

.000.000.000

Independence model

1.000.000.000
NCP

Model

NCPLO 90HI 90

Saturated model

.000.000.000

Independence model

2540.2232376.7652711.018
FMIN

Model

FMINF0LO 90HI 90

Saturated model

.000.000.000.000

Independence model

19.53918.95717.73720.231
RMSEA

Model

RMSEALO 90HI 90PCLOSE

Independence model

.493.477.509.000
AIC

Model

AICBCCBICCAIC

Saturated model

182.000203.233446.380537.380

Independence model

2644.2232647.2562681.9912694.991
ECVI

Model

ECVILO 90HI 90MECVI

Saturated model

1.3581.3581.3581.517

Independence model

19.73318.51321.00819.756
HOELTER

Model

HOELTER
.05
HOELTER
.01

Independence model

66

Execution time summary

Minimization:	.009
Miscellaneous:	.102
Bootstrap:	.000
Total:	.111