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Avoid abort after "FOAM FATAL IO ERROR"

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Old   July 4, 2013, 09:04
Default Avoid abort after "FOAM FATAL IO ERROR"
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thomas
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Hello,
usually the solvers abort program execution with the message "--> FOAM FATAL IO ERROR" if there is something wrong with the format of the input data (for example giving "value (0 0 0)" instead of "uniformValue (0 0 0)" to a uniform boundary condition).

This is problematic, because I have to run some clean-up code when the solver crashes after wrong user input (I use a modification of the standard solvers).

Is the program abort hard coded in OpenFOAM? Or can I change some switch (in the global controlDict, maybe?) so that a warning is shown or an exception is thrown instead of exiting immediately?

Thomas
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Old   July 9, 2013, 09:30
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David Gaden
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It is a program exit, not an abort. There is no stack after a fatal IO error.

I don't think you can change this behaviour. You could find the source where it throws the error and exits (buried in src/OpenFOAM) but what would you change? Stop it from throwing the error?

The problem is: the program doesn't know how to continue when it gets bad input, the only thing it can do is tell the user and exit. For example, let's say it needs to read a dimensionedScalar "gamma", but encounters:

Code:
gamma    gamma 1.250 [0 0 0 0 0 0 0];
The dimensions are in the wrong position. The program is written to read the name, the dimensions, then the value. It is not flexible enough to dynamically change the order of these. It will throw the IO error when it doesn't encounter a "[" after "gamma. If you want to force it to continue, what should it do? Assume a default value for gamma?

Hope that helps!
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