r - Could not compute QR decomposition of Hessian CFA/SEM -

i using sem package build sem model. model can run however, there warning message this:

warning message: in eval(expr, envir, enclos) : not compute qr decomposition of hessian. optimization did not converge. 

if run summary(cfa1.test), warning error message this:

error in summary.objectiveml(cfa1.test) :  coefficient covariances cannot computed in addition: warning message: in vcov.sem(object, robust = robust, analytic = analytic.se) : singular hessian: model underidentified. 

my model relationships among market orientation (mo), government incentives(gvincent), entreprenuerial orientation(eo) , firm performance(firmp). these 4 second order constructs. under each of them there number of constructs, example, responsiveness (resp), proactiveness (proa), economic performance(econp), government financial incentives (gvfin) , under sub constructs, there observed variables such resp3,4, 5 , econp(1-12).

below codes of model:

model.1<-specifymodel()  gvinfo->gvinfo1, na, 1       #all lamda observed latent (56 lines)  gvinfo->gvinfo2, lam112, na  gvinfo->gvinfo3, lam113, na  gvinfo->gvinfo4, lam114, na  gvinfo->gvinfo5, lam115, na  gvinfo->gvinfo6, lam116, na  gvinfo->gvinfo7, lam117, na  gvfin->gvfin1, na, 1  gvfin->gvfin2, lam122, na  gvfin->gvfin3, lam123, na  gvfin->gvfin4, lam124, na  gvfin->gvfin5, lam125, na  gvfin->gvfin6, lam126, na  gvfin->gvfin7, lam127, na  gvpat->gvpat1, na, 1  gvpat->gvpat2, lam132, na  gvpat->gvpat3, lam133, na  gvpat->gvpat4, lam134, na  gvpat->gvpat5, lam135, na  econp->econp1, na, 1  econp->econp2, lam402, na  econp->econp3, lam403, na  econp->econp4, lam404, na  econp->econp5, lam405, na  econp->econp6, lam406, na  econp->econp7, lam407, na  econp->econp8, lam408, na  econp->econp9, lam409, na  econp->econp10, lam410, na  econp->econp11, lam411, na  econp->econp12, lam412, na  socp->socp1, na, 1  socp->socp2, lam422, na  infog->infog1, na, 1  infog->infog2, lam312, na  infog->infog3, lam313, na  infog->infog4, lam314, na  infog->infog5, lam315, na  infog->infog6, lam316, na  infod->infod1, na, 1  infod->infod2, lam322, na  infod->infod3, lam323, na  infod->infod4, lam324, na  infod->infod5, lam325, na  resp->resp3, na, 1  resp->resp4, lam334, na  resp->resp5, lam335, na  innov->innov1, na, 1  innov->innov2, lam212, na  innov->innov3, lam213, na  proa->proa1, na, 1  proa->proa2, lam222, na  proa->proa3, lam223, na  riskt->riskt1, na, 1  riskt->riskt2, lam232, na  riskt->riskt3, lam233, na  #all lamda observed latent  gvincent->gvinfo, na, 1 #sub construct construct (11 lines)  gvincent->gvfin, beta12, na  gvincent->gvpat, beta13, na  firmp->enop, na, 1  firmp->socp, beta42, na  eo->innov, na, 1  eo->proa, beta22, na  eo->riskt, beta23, na  mo->infog, na, 1  mo->infod, beta32, na  mo->resp, beta33, na #sub construct construct  eo->firmp, beta24, na #path end end constructs (5 lines)  mo->firmp, beta34, na #path end end constructs  gvincent->eo, gam12, na #exd end construct  gvincent->firmp, gam14, na #exd end construct  eo<->mo, psi23, na #correlation btw end  gvincent<->gvincent, phi11, na #error temrs exds (4 lines)  eo<->eo, psi22, na #error temrs ends  mo<->mo, psi33, na   firmp<->firmp, psi44, na #error temrs ends  gvinfo<->gvinfo, psi1111, na #error temrs ends subconstructs (11 lines)  gvfin<->gvfin, psi1212, na  gvpat<->gvpat, psi1313, na  innov<->innov, psi2121, na  proa<->proa, psi2222, na  riskt<->riskt, psi2323, na  infog<->infog, psi3131, na  infod<->infod, psi3232, na  resp<->resp, psi3333, na #error terms ends subconstructs  econp<->econp, psi4141, na  socp<->socp, psi4242, na  gvinfo1<->gvinfo1, the111, na          #errors of factor indicators of ends  gvinfo2<->gvinfo2, the112, na  gvinfo3<->gvinfo3, the113, na  gvinfo4<->gvinfo4, the114, na  gvinfo5<->gvinfo5, the115, na  gvinfo6<->gvinfo6, the116, na  gvinfo7<->gvinfo7, the117, na  gvfin1<->gvfin1, the121, na  gvfin2<->gvfin2, the122, na  gvfin3<->gvfin3, the123, na  gvfin4<->gvfin4, the124, na  gvfin5<->gvfin5, the125, na  gvfin6<->gvfin6, the126, na  gvfin7<->gvfin7, the127, na  gvpat1<->gvpat1, the131, na  gvpat2<->gvpat2, the132, na  gvpat3<->gvpat3, the133, na  gvpat4<->gvpat4, the134, na  gvpat5<->gvpat5, the135, na     econp1<->econp1, the401, na  econp2<->econp2, the402, na  econp3<->econp3, the403, na        econp4<->econp4, the404, na  econp5<->econp5, the405, na  econp6<->econp6, the406, na  econp7<->econp7, the407, na  econp8<->econp8, the408, na  econp9<->econp9, the409, na  econp10<->econp10, the410, na  econp11<->econp11, the411, na  econp12<->econp12, the412, na  socp1<->socp1, the421, na  socp2<->socp2, the422, na  infog1<->infog1, the311, na  infog2<->infog2, the312, na  infog3<->infog3, the313, na  infog4<->infog4, the314, na  infog5<->infog5, the315, na  infog6<->infog6, the316, na  infod1<->infod1, the321, na  infod2<->infod2, the322, na  infod3<->infod3, the323, na  infod4<->infod4, the324, na  infod5<->infod5, the325, na  resp3<->resp3, the333, na  resp4<->resp4, the334, na  resp5<->resp5, the335, na  innov1<->innov1, the211, na  innov2<->innov2, the212, na  innov3<->innov3, the213, na  proa1<->proa1, the221, na  proa2<->proa2, the222, na  proa3<->proa3, the223, na  riskt1<->riskt1, the231, na  riskt2<->riskt2, the232, na  riskt3<->riskt3, the233, na           #errors of factor indicators of ends  #model1 test  cfa1.test<-sem(model.1,cormat.model.1, n=534)  summary(cfa1.test) 

it nice if let me know probelms error , warning messages indicate , how should deal them. appreciated.