H5G Errors during

[Bradley]

Hi there when computing an Unsteady Flow Analysis it completes however notifies me of some H5G errors as seen below in the running script (Ive also come accross HD5 errors and also wandering what those are). Is anyone able to explain what these mean/ If I need to do anything about this?

Best
Brad

——————————————————
Plan: ‘Plan 12’ (MouCol_Reach.p12)
Simulation started at: 08Mar2017 07:53:28 PM
Using 64 Bit Computation Engines

Writing Geometry
Completed Writing Geometry

Geometric Preprocessor HEC-RAS 5.0.1 April 2016

Finished Processing Geometry

Writing Event Conditions
Event Conditions Complete

Performing Unsteady Flow Simulation HEC-RAS 5.0.1 April 2016

Initial Backwater, Split flow optimization, iteration 1
Initial Backwater, Split flow optimization, iteration 2
Maximum iterations of 20 RS WSEL ERROR

03SEP2008 06:10:00 Colusa Bypass Colusa Bypass 1063.71 53.64 0.038
03SEP2008 06:20:00 Colusa Bypass Colusa Bypass 735.73 52.76 0.071

The maximum xsec wsel error was 0.071
Colusa Bypass Colusa Bypass 735.73 at 03SEP2008 06:20:00

Finished Unsteady Flow Simulation
HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0:
#000: ..\..\src\H5G.c line 463 in H5Gopen2(): unable to open group
major: Symbol table
minor: Can’t open object
#001: ..\..\src\H5Gint.c line 320 in H5G__open_name(): group not found
major: Symbol table
minor: Object not found
#002: ..\..\src\H5Gloc.c line 430 in H5G_loc_find(): can’t find object
major: Symbol table
minor: Object not found
#003: ..\..\src\H5Gtraverse.c line 861 in H5G_traverse(): internal path traversal failed

Writing Results to DSS
major: Symbol table
minor: Object not found
#004: ..\..\src\H5Gtraverse.c line 641 in H5G_traverse_real(): traversal operator failed
major: Symbol table
minor: Callback failed
#005: ..\..\src\H5Gloc.c line 385 in H5G_loc_find_cb(): object ‘Unsteady’ doesn’t exist
major: Symbol table
minor: Object not found
Finished Writing Results to DSS

Reading Data for Post Process

Running Post Processor HEC-RAS 5.0.1 April 2016

Finished Post Processing

Computations Summary

Computation Task Time(hh:mm:ss)
Completing Geometry <1
Preprocessing Geometry(64) <1
Unsteady Flow Computations(64) 2
Writing to DSS(64) <1
Post-Processing(64) 5
Complete Process 8

[cameron]

First I would update to the 5.0.3 version of HEC-RAS to see if that fixes the problem. HDF is the new file format for HEC-RAS and results get stored in the *.01p.hdf. This issue could have to do with writing to the hdf file and you may need to delete the hdf file and have HEC-RAS recreate it. Are these files located on your local machine or from a network? I would also trying running the model on a different machine and see if the error is still there.

[Bradley]

Thanks for your reply Cameron, Unfortunately I am working on a business PC’s (all with HECRAS 5.0.1) that will not allow updates of any software until July each year (Crazy I know) (I only own a Mac myself). Thank you for the explanation, that makes some sense.

These files are on LocalData on the computer itself, I have tried may different computers with the same error.

Best
Brad

[Jonatserrano]

Hi. I’m currently using HEC RAS 5.0.5. I think it is the latest version as of now. I’m having similar errors with you. My model is a simple dam breach model where I have:

– storage area (upstream)
– SA/2D connection (dam with breach plan)
– 2D Flow Area (downstream)

I’ve tried it with and without boundary conditions (original plan is to not include any BC but just tried to put a BC downstream just to see if it affects the simulation). However, the errors are still there. Here are the errors:

Unsteady flow encountered an error.

HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0:

Error starting unsteady simulation – Stopping compute process

Computations Summary

Computation Task Time(hh:mm:ss)
Completing Geometry(64) 2
Preprocessing Geometry(64) <1
Unsteady Flow Computations(64) <1
Complete Process 2
#000: ..\..\src\H5G.c line 463 in H5Gopen2(): unable to open group
major: Symbol table
minor: Can't open object
#001: ..\..\src\H5Gint.c line 320 in H5G__open_name(): group not found
major: Symbol table
minor: Object not found
#002: ..\..\src\H5Gloc.c line 430 in H5G_loc_find(): can't find object
major: Symbol table
minor: Object not found
#003: ..\..\src\H5Gtraverse.c line 861 in H5G_traverse(): internal path traversal failed
major: Symbol table
minor: Object not found
#004: ..\..\src\H5Gtraverse.c line 641 in H5G_traverse_real(): traversal operator failed
major: Symbol table
minor: Callback failed
#005: ..\..\src\H5Gloc.c line 385 in H5G_loc_find_cb(): object 'Unsteady' doesn't exist
major: Symbol table
minor: Object not found
HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0:
#000: ..\..\src\H5L.c line 813 in H5Lexists(): not a location
major: Invalid arguments to routine
minor: Inappropriate type
#001: ..\..\src\H5Gloc.c line 253 in H5G_loc(): invalid object ID
major: Invalid arguments to routine
minor: Bad value

I hope anyone can help. I've seen in another thread you can download an hdf5 in https://www.hdfgroup.org but I don't really know how to go about it. :(( Thanks in advance for any help out there.

[Anonymous]

Im having the same issue as you have you been able to fix it? Ive been struggling for a day or two now.

Cheers,
Lorenzo

[Anonymous]

ME TOO HAS THE PROBLEME PLEEASE IF ANY BODY KNOW TELL ME

[Anonymous]

Rectify that the normal depth is downstream and the hydrograph is upstream.

[Kathleen H.]

Hi there – I am getting a similar error that causes my model to crash. Error is below. I am trying to run a model that runs fine in 5.0.6, but gives these errors and crashes when I try to run it in 6.1. Any ideas on how to fix this?

HDF_ERROR trying to use HDF output file
Subroutine READ_UN_HDF_XS_TAB
HDF_ERROR trying to close HDF output file:
HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0:
#000: ..\..\src\H5G.c line 463 in H5Gopen2(): unable to open group
major: Symbol table

Error starting unsteady simulation – Stopping compute process
Computations Summary

Computation Task Time(hh:mm:ss)
Completing Geometry <1
Completing Event Conditions <1
Unsteady Flow Computations <1
Complete Process 1
minor: Can’t open object
#001: ..\..\src\H5Gint.c line 320 in H5G__open_name(): group not found
major: Symbol table
minor: Object not found
#002: ..\..\src\H5Gloc.c line 430 in H5G_loc_find(): can’t find object
major: Symbol table
minor: Object not found
#003: ..\..\src\H5Gtraverse.c line 861 in H5G_traverse(): internal path traversal failed
major: Symbol table
minor: Object not found
#004: ..\..\src\H5Gtraverse.c line 641 in H5G_traverse_real(): traversal operator failed
major: Symbol table
minor: Callback failed
#005: ..\..\src\H5Gloc.c line 385 in H5G_loc_find_cb(): object ‘Cross Sections’ doesn’t exist
major: Symbol table
minor: Object not found

[Kathleen H.]

I realized this only happened for a certain geometry file within my model and a very wise coworker just helped me resolve the issue – if you select the box for Geometry Preprocessor in the Unsteady Flow Analysis window, it runs! I hope this helps others with the same problem.

[Author]

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