I am currently trying to create a landslide susceptibility map of an area using TRIGRS (a Fortran program for slope stability analysis), and running the elevation grid file along with a flow direction grid in TopoIndex (a sister program) is the first step to it. However, when TopoIndex starts to read the flow direction grid file that I provided, it shows an error message before exiting the program without producing any result. The error message goes like this:
? FORTRAN Runtime Error:
? Subscript is out of range for dimension 1 for array
? adr with bounds 1:255
File ./mpfldr.f; Line 20
This error does not show in the log file either, and I was only able to see this error message by trying to catch a screenshot of the window right before it closes. Attached is the image of the window showing the error message.
Is there anything wrong with the flow direction grid that I made, and if so, what corrections can I do to solve the error?
Dear Jhedy,
This is just a guess, based on some FORTRAN experience I gathered some 30 years ago.
Unlike software today that can interpret numbers of relatively free formatting, FORTRAN (FORTRAN 77 and before) was very sensitive about the data (number) formats, as the records were assumed to be read from punched cards (aka Hollerith cards) :-) so the position of all digits was very vital. Some positions had to be left empty, some had to be filled up with digits. Nice old world.
An advice that may help: check the input numbers for exact formats (integer?floating point?do not mix), are the separators at the right places? do you use decimal dot (some locals use decimal comma which will be interpreted as separators)?, are your floating point numbers properly formatted?, etc.
If the first few values that you read in determine e.g. the size of the arrays, a single space at a wrong place could cause such an error.
Just an idea. Kind regards, Balázs
I rechecked my data, and I did find some errors in the data input. Thank you for the advice! :)
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