Error exit from CFAST code = -7

[Jaime Cadena]

Hello everyone,

I'm running a set of fires with varying HRR profile. In a couple of runs I have encountered the following mistake and I come here for help, since I cannot find anything related in the User's guide:

Log: ***Error exit from CFAST code = -7

Log: ***Error, dassl - idid = -7

Log: ***Warning:  pressure in room  3

Log: ***Warning:  Solution component with the greatest error is

Log: ierror,r1,r2 =  650    0.7591D+02    0.2531D-06

Log: ***Error: at t (=r1) and stepsize h (=r2) the corrector failed to converge repeatedly or with abs(h)=hmin

Log: Smoke Alarm (Sensor 9) has activated at 59 s in compartment 16

Log: Smoke Alarm (Sensor 8) has activated at 14 s in compartment 14

Log: 

Log: Compilation Date : Fri 08/11/2017  01:14 PM

Log: Revision Date    : Fri Aug 11 13:13:58 2017 -0400

Log: Revision         : CFAST7.2.3-4-gdf4c1b82

Log: Release Version  : CFAST 7.2.3

Log: 

Log: CFAST

Log: 

Please let me know if you have an idea of what might be failing in this run. I appreciate your help and time.

Regards,

Jaime Cadena

[andyta...@yahoo.com]

Hi Jaime,

It looks like your simulation is stuck at the solver subroutine. Specifically, it seems that the convergence test fails to pass in the corrector step. I am not sure if I can be of any help, but if you can post your input file, we can take a look.

Thanks,

Andy

[Jaime Cadena]

Hi Andy,

Ok, I attach one of the files that has had the issue. I reduced the original simulation time from 1600 to 600, which is the step previous to the failure (fails at about 700 s). I thank you before hand for any help you can give me.

Regards,

Jaime