Preprocessor Crashes at Culverts

[Colin S.]

I’d like to run an old v4.0 unsteady, 1D RAS model in v5.0.4, but I haven’t been able to get the preprocessor to run successfully. It seems to be hung up on culverts. I’ve played with pilot channels, upstream and downstream XS geometry, ineffective areas, HTab parameters, and even deleted many of the problematic culverts altogether, but the preprocessor just hangs up on another culvert. I remember having this issue when attempting to update to v4.1 several years ago too. Any ideas? Thanks in advance!

Here is the error message:

Plan: ‘TEST_50YR’ (TEST.p01)
Simulation started at: 18Jun2018 09:51:42 AM
Using 64 Bit Computation Engines

Writing Geometry
Computing Bank Lines
Bank lines generated in 1335 ms
Computing Edge Lines
Edge Lines generated in 1316 ms
Computing XS Interpolation Surface
XS Interpolation Surface generated in 811 ms
Completed Writing Geometry

Geometric Preprocessor HEC-RAS 5.0.4 April 2018
forrtl: severe (157): Program Exception – access violation
Image PC Routine Line Source
RASGeomPreprocess 00007FF6A2929C79 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A28BD4BB Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2920E8C Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A29B4165 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2ACCBE8 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2842245 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A28B612A Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A29088F2 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A283443A Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A29E3FD0 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2A08160 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2A73E27 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2AFF4EB Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2871A7F Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A28BF628 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A289E6B2 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2931A63 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A291345F Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2AC816B Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2A36C09 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A2AAECDD Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A29950B9 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A31E154E Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A82FF904 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A82FF827 Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A82FF6EE Unknown Unknown Unknown
RASGeomPreprocess 00007FF6A82FF979 Unknown Unknown Unknown
KERNEL32.DLL 00007FFFFF532784 Unknown Unknown Unknown
ntdll.dll 00007FF801FE0D51 Unknown Unknown Unknown

Error with program: RASGeomPreprocess64.exe Exit Code = 157

Computations Summary

Computation Task Time(hh:mm:ss)
Completing Geometry(64) 7
Preprocessing Geometry(64) 12:35
Complete Process 12:43

[Colin S.]

FYI… I was able to resolve this issue by modifying the upstream and downstream cross sections associated with each of the “problem culverts”. Each of these cross sections included a horizontal segment at each end. I realized these segments were the offenders because the IB calculations was crashing at the the top of each problem cross section. By adding 0.01 ft elevation to the first and last point of each cross section and eliminating the horizontal segments, the preprocessor was able to complete without issue.

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