Can't restart a simulation in svFSI #118
Description
Description
I wanted to restart a simulation in an specifically time step in svFSI. The simulation was stopped correctly using the file STOP_SIM, but after when I wanted to restart it setting "true" in "Continuous previous simulation" parameter on the input file, appeared the following error: "[31mERROR: Number of nodes <2207> does not match with Bechmark-CM-50mV/stFile_last.bin <2135>[0m"
I looked on the source code, specifically on the file INITIALIZE.f. There is a part where are checked some variables before restart the simulation and there is defined the error that appears to me:
! First checking all variables on master processor, since on the
! other processor data will be shifted due to any change on the
! sizes
IF (cm%mas()) THEN
IF (tStamp(1) .NE. stamp(1)) err = "Number of processors <"//
2 tStamp(1)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(1)//">"
IF (tStamp(2) .NE. stamp(2)) err = "Number of equations <"//
2 tStamp(2)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(2)//">"
IF (tStamp(3) .NE. stamp(3)) err = "Number of meshes <"//
2 tStamp(3)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(3)//">"
IF (tStamp(4) .NE. stamp(4)) err = "Number of nodes <"//
2 tStamp(4)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(4)//">"
IF (tStamp(5) .NE. stamp(5)) err = "Number of cplBC%x <"//
2 tStamp(5)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(5)//">"
IF (tStamp(6) .NE. stamp(6)) err = "Number of dof <"//
2 tStamp(6)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(6)//">"
IF (tStamp(7) .NE. stamp(7)) err = "dFlag specification"//
2 " <"//tStamp(7)//"> does not match with "//
3 TRIM(fName)//" <"//stamp(7)//">"
END IF
Looking up what is "stamp(4)", I found out is referred to the variable 'tnNo' which is the "Total number of nodes". I printed this variable to see what kind of values it had and I discovered that between each time step, its value change constantly:
EP 1-1 7.9E-2 [ 0 1.00000 1.00000 4.62E-7] [ 17 -146 10]
EP 1-2 1.3E-1 [-126 4.63E-7 4.63E-7 5.87E-4] [ 11 -74 8]
6246
5961
6366
6211
6211
6282
6003
6226
6158
6157
6319
6114
I don't understand why is constantly changing.
Reproduction
The simulation that I did was using CEP equation. You can try to do a simple proof stopping the simulation in any time step with the file STOP_SIM and try to restart it. It will take the file "stFile_last.bin" to restart the simulation.
Expected behavior
I expected that after setting the following parameters in the input file, the simulation was restarted correctly from the last time step that was done before stop the simulation.
#----------------------------------------------------------------
General simulation parameters
Continue previous simulation: t
Number of spatial dimensions: 3
Number of time steps: 200000
Time step size: 0.01
Spectral radius of infinite time step: 0.50
Searched file name to trigger stop: STOP_SIM
Save results to VTK format: t
Name prefix of saved VTK files: result
Increment in saving VTK files: 100
Start saving after time step: 1
Starting time step: 0
Restart file name: stFile
Overwrite restart file: f
Increment in saving restart files: 100
Convert BIN to VTK format: f
Save results in folder: restart_results
Verbose: 1
Warning: 1
Debug: 0
#----------------------------------------------------------------
Additional context
I don't know if the problem is in how I state the "General simulation parameters" on the input file or is an inner problem of the code related to the variable 'tnNo'.
Code of Conduct
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