HydroBioGeoChem 123D (HBGC123D) Bugs

Known bugs in HydroBioGeoChem 123D

The following list contains all bugs that were present in certain downloaded versions. If you kept the archive file of the download, you can see its creation time in the filename. The format is hbgc_1999_month_day_hour_minute... for Windows and hbgc.1999.month.day.hour.minute... for UNIX systems.

If you did not keep the archive, you may check the creation time of the executable ("hbgc123d.exe" for Windows, "hbgc123d" for UNIX systems).

Your version of HBGC123D will not be affected by a bug if you downloaded your copy of HBGC123D after the time of the bug fix or if your platform is not listed in the affected platforms.

• Incorrect convergence check for fully implicit scheme
  
  Platforms: all platforms
  
  Time of bug fix: March 18, 1999, 17:00 EST
  
  Occurrence: The bug occurs when the fully implicit scheme is chosen (IOPTRS = 0 in Data Set 2) and no heat transport is simulated. For each time step, NITER (also in Data Set 2) iterations will be performed, and then an error message about non-convergence is printed to the ASCII output file.
  
  This problem does not occur when the operator splitting scheme is used (IOPTRS = 1).
  
  Sample problem 1 (Biodegradation coupled with transport) uses the fully implicit scheme, all other samples use the operator splitting scheme.
• Program stops when running pure heat transfer simulation

  Platforms: DEC alpha, IBM RS6000
  
  Time of bug fix: March 26, 1999, 15:00 EST
  
  Occurrence: Affected are simulations with heat transport and no chemical components, e.g. sample problem 4. The program stops with a message "Out of memory error in dmat".

• Program fails when running some simulations involving microbiological reactions
  
  Platform: DEC alpha
  
  Time of bug fix: March 31, 1999, 11:30 EST
  
  Occurrence: Some simulations with microbiological reactions (e.g. sample problem 3) cause a program failure ("Floating point invalid").
• Incorrect solution of transport equation for triangular elements

  Platforms: All platforms
  
  Time of bug fix: Release Version 1.1 (August 5, 1999)
  
  Occurrence: Transport calculations based on a two-dimensional mesh with triangular elements resulted under certain conditions in negative concentrations. If the simulation also included microbiological reactions, this lead to the termination of the simulation.

• Incorrect setup of matrix for the transport solution in 2D

  Platforms: All platforms
  
  Time of bug fix: December 12, 2000 (Windows version only)
  
  Occurrence: Transport calculations based on a two-dimensional mesh (triangular or quadrangular elements) could result in unphysically high concentrations at some nodes of the mesh.

• Incorrect reading of input file

  Platforms: All platforms
  
  Time of bug fix: December 12, 2000 (Windows version only)
  
  Occurrence: A read error occurred when there were distributed source boundary conditions and more than one component and/or kinetic species, or when there were ion-exchanged species of complexed species.

Bug reports should be directed to

Dr. J. P. (Jack) Gwo

Department of Civil and Environmental Engineering

University of Maryland, Baltimore County

1000 Hilltop Circle

Baltimore, MD 21250

jgwo@umbc.edu

 

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