What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?

What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?

[Fatafa]

I ran a compiled Ada program and got back the error :

raised ADA.IO_EXCEPTIONS.DATA_ERROR

Does anyone know what this means?

Thanks

Re: What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?

[Grein, Christoph]

> I ran a compiled Ada program and got back the error :
> 
> raised ADA.IO_EXCEPTIONS.DATA_ERROR
> 
> Does anyone know what this means?

Get a text book on Ada. Anybody using Ada knows what this means.

See RM A.13(13) You probably read a data item from a file or keyboard input that 
does not have the expected type.

Re: What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?

[Colin Paul Gloster]

Fatafa said today:
"I ran a compiled Ada program and got back the error :

raised ADA.IO_EXCEPTIONS.DATA_ERROR

Does anyone know what this means?"

When giving input to your program, you probably gave it something it was
not designed to (e.g. maybe it needed a number and you typed in text).

From HTTP://WWW.AdaIC.org/standards/95lrm/html/RM-A-13.html :

"[..]

The exception Data_Error can be propagated by the procedure Read (or by
the Read attribute) if the element read cannot be
interpreted as a value of the required subtype. This exception is also
propagated by a procedure Get (defined in the package
Text_IO) if the input character sequence fails to satisfy the required
syntax, or if the value input does not belong to the range of the
required subtype.

[..]"

Re: What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?

[Stephen Leake]

jul_tuf@hotmail.com (Fatafa) writes:

> I ran a compiled Ada program and got back the error :
> 
> raised ADA.IO_EXCEPTIONS.DATA_ERROR
> 
> Does anyone know what this means?

Run it again under the debugger, and set a break on exceptions. Then
you will be shown the exact line that is causing the problem

Or, if using GNAT, add an exception handler that dumps the stack
symbolically; then you can see the exact line without the debugger.

-- 
-- Stephe