Start type 6 in KENO-VI

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Yevgen Bilodid

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Apr 21, 2026, 5:01:49 AMApr 21
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Hi all!
I'm trying to set up a start type 6 in KENO-VI while reading start data from ASCII file (RDU=) in SCALE 6.2.4.
The SCALE User manual doesn't tell alot about file format.
I use information from SCALE 6.3 manual (para 8.1 in https://scale-manual.ornl.gov/Keno.html).
It says, for start type 6 data set I shoud refer to Sect. 8.1.3.8.1.
I made a small program, that formats my start data to (3es20.9,5i12) format.
Running SCALE I get a conversion error: 

forrtl: severe (64): input conversion error, unit 18, file \*skipped*\rdu
Image              PC                Routine            Line        Source
libifcoremd.dll    00007FFD9875C352  Unknown               Unknown  Unknown
libifcoremd.dll    00007FFD987AB74F  Unknown               Unknown  Unknown
scale.exe          00007FF6611A6B63  RDSTRT_I_mp_RDSTR         212  rdstrt_I.f90
scale.exe          00007FF660893C7A  DATAIN_M_mp_DATAI         336  datain_M.f90
scale.exe          00007FF660884CB0  SASSY_M_mp_SASSY          126  sassy_M.f90
scale.exe          00007FF660879860  KENOBUILDER_M_mp_         233  KenoBuilder_M.f90
scale.exe          00007FF660878A9B  KENOBUILDER_M_mp_          15  KenoBuilder_M.f90
scale.exe          00007FF660878747  CsasInterface_MG_          41  KenoBuilder_I.f90
scale.exe          00007FF660298E02  Unknown               Unknown  Unknown
scale.exe          00007FF660291E74  Unknown               Unknown  Unknown
scale.exe          00007FF6601CA46D  Unknown               Unknown  Unknown
scale.exe          00007FF6601C293C  Unknown               Unknown  Unknown
scale.exe          00007FF6601B21C2  Unknown               Unknown  Unknown
scale.exe          00007FF661CB8B63  Unknown               Unknown  Unknown
KERNEL32.DLL       00007FFE08B0E8D7  Unknown               Unknown  Unknown
ntdll.dll          00007FFE0982C3FC  Unknown               Unknown  Unknown


My full start data set file consists of 8470 points/lines, therefore I use this number.
I made a small simple example to resolve this issue (attached).
I tried many combinations of columns, lines and NPG/LNU numbers. Nothing works.
Sometimes I got an 'unexpected end of file' error instead of 'conversion' error.
Please help.

simple.inp
x_xyz_keno1.rdu
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Jordan McDonnell

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May 5, 2026, 4:20:22 PMMay 5
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Hello, Yevgen.  

I understand that the attached RDU file is a small sample of your full one, but it does demonstrate some of the potential problems you are encountering.  

As is, I encounter a similar crash.  I compared the file to the format expected for the KENO read start type=6 RDU files (https://scale-manual.ornl.gov/Keno.html#ascii-start-data-file-format), 
and 
1. The column widths in your RDU file are not correct.  The first three columns must be exactly 20 characters wide, and the remaining columns must be exactly 12 characters wide.  
2. The file must end with a line that has the last number for LNU set equal to zero to signify the end.  In the example RDU files I have referred to (including the one in the SCALE manual), it looks like a fine practice is to copy the last line you intend for the RDU file, but replace the last number with 0.  

When I made those adjustments, it no longer crashes when reading the RDU file.  I see other errors, but they seem to be related to the geometry definition.  

Thank you,
  Jordan McDonnell
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