Question:

When analyzing a model in AutoPIPE Vessel the following warning number was reported. 

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Intel(r) Visual Fortran run-time error 
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forrtl: severe (408): fort: (11): Subscript #1 of the array SHELL has value 0 which is less than the lower bound of 1

Image              PC                Routine            Line        Source             
libifcoremd.dll    00007FFB89C5DBCC  Unknown               Unknown  Unknown
procal.exe         00007FF7A86587C0  Unknown               Unknown  Unknown
procal.exe         00007FF7A78E076D  Unknown               Unknown  Unknown
procal.exe         00007FF7A78CBFC8  Unknown               Unknown  Unknown
procal.exe         00007FF7A763A4A9  Unknown               Unknown  Unknown
procal.exe         00007FF7AF224C8C  Unknown               Unknown  Unknown
KERNEL32.DLL       00007FFC355CE8D7  Unknown               Unknown  Unknown
ntdll.dll          00007FFC36B1BF2C  Unknown               Unknown  Unknown

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OK   
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Why and how to avoid it?

Answer: 

When using the tank module, the applicable codes usually require that bottom plates be added into the model before running an analysis. 

Confirm bottom plates are defined by looking at the bottom of the tank in the 3d view. 

Avoidance:

Simply inserting a bottom plate before running an analysis.