[TRNSYS-users] Problems with TRNFLOW

[struong at student.ulg.ac.be]

Hello TRNSYS users,

I'm having a problem with my simulation. I'm simulating a whole year using TRNFLOW and there seem to be problems for coverging and so the simulation stops before the end. In my .lst I keep having the WARNINGS below. How can I increase the maximum of iterations allowed in TRNFLOW? Or how can I adjust my ventilation network in order to have less iterations? 

I also have another ERROR message (see below) but I don't know what it means... Could someone help me on the signification of this ERROR message?

Best regards,

TRUONG VAN QUYNH Stéphan
2 ème MASTER STE 
Ulg - Gembloux Agro Bio-Tech 



***** WARNING ***** UNIT 56 TYPE 56, TIME =   3.036E+03
 COMIS MESSAGE  ***** ERROR *****   
 Ventilation network solver reached maximum number of Jacobian factorizations.
 Increase &-PR-CONTrol Miter, or adjust the network.
  
  VENTILATION NETWORK SOLVER REPORTS ERROR
  
 There were too many iterations.
 The maximum allowed (see *CIF &-PR-CONTrol) is:          50
 ----------------------------------------------------------------


 ***** WARNING ***** UNIT 56 TYPE 56, TIME =   3.036E+03
 COMIS MESSAGE  ***** ERROR *****   
 Ventilation network solver reached maximum number of Jacobian factorizations.
 Increase &-PR-CONTrol Miter, or adjust the network.
  
  VENTILATION NETWORK SOLVER REPORTS ERROR
  
 There were too many iterations.
 The maximum allowed (see *CIF &-PR-CONTrol) is:          50
 ----------------------------------------------------------------


 ***** WARNING ***** UNIT 56 TYPE 56, TIME =   3.036E+03
 COMIS MESSAGE  ***** ERROR *****   
 Error in the ventilation part!  MATRIX SINGULAR FOR ZONE 1
  
  VENTILATION NETWORK SOLVER REPORTS ERROR