Re: Using ATL::Trace we receive "Incorrect format specifier"

From:
"Alexander Nickolov" <agnickolov@mvps.org>
Newsgroups:
microsoft.public.vc.atl
Date:
Fri, 11 May 2007 10:03:20 -0700
Message-ID:
<OF89H5#kHHA.4312@TK2MSFTNGP02.phx.gbl>
I don't recall your using TRACE0 - your code uses TRACE.

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://vcfaq.mvps.org
=====================================

"radrain" <radrain@discussions.microsoft.com> wrote in message
news:2828CBF1-D977-4E33-B2AE-47428252739E@microsoft.com...

afx.h shows multiple signatures associated with the 'TRACE' macro, the
first
being:

#define TRACE0(sz)

which, I would think treat this a only a string and no formatting.

Regards,

--
RADrain

"Igor Tandetnik" wrote:

radrain <radrain@discussions.microsoft.com> wrote:

When using "TRACE" in debugging the call stack winds down to
AtlTraceVA method in atldebugapi.cpp to line:

ATL_CRT_ERRORCHECK_SPRINTF(_vsnprintf_s(szBuf + nLen, nCount - nLen,
nCount - nLen - 1, pszFormat, ptr));

I receive an assert with "Incorrect format specifer" while processing
the _vsnprintf_s statement and eventually results with an unhandled
exception fault.

Our original call is:

TRACE ( Str.Left(510) );


The first parameter of TRACE is supposed to be a printf-like format
string. I guess your string contains % characters in it, which are being
interpreted as format specifiers. Try

TRACE ("%s", Str.Left(510) );

--
With best wishes,
    Igor Tandetnik

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