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Newsgroups: comp.lang.ada
From: Colin_Paul_Gloster@ACM.org (Colin Paul Gloster)
Subject: Re: What does "raised ADA.IO_EXCEPTIONS.DATA_ERROR" mean?
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Date: 27 Jan 2003 13:05:14 GMT
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Date: 2003-01-27T13:05:14+00:00
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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.

[..]"