[FLASH-USERS] block identification after an error

[g.granda at irya.unam.mx]

Hello Flash users,
I'm getting some errors at run-time of a simulation of a gravitational 
collapse under the presence of a magnetic field. The error is:

WARNING after gc filling: min. 
unk(DENS_VAR)=-0.5821098936325356600795E-22    PE=108   block=68
DRIVER_ABORT: This place must not be accessed

So, the negative density occurs at a guard cell of the block 68 of the 
processor 108. I wonder if you guys know how to identify where this 
block is located in the computational domain. I would like to know where 
this is exactly happening so I can track the error.

This negative density produces the following message on the log file:

[ 08-20-2019  23:14:06.336 ] [DRIVER_ABORT]: Driver_abort() called by PE 
           0
[ 08-20-2019  23:14:06.336 ] abort_message: This place must not be 
accessed

So, I wonder if it is possible to tell FLASH somehow to write a check 
file when this negative density shows up or when there is a driver_abort 
error. I know when the time step dt is less than dt_min, it is possible 
to write a check file by setting dr_dtMinBelowAction = 1 in the 
flash.par.

Cheers,
Guido