Conference azur::mcc

865.0. "Question on error reply model" by ODAY27::WALTZ () Wed Apr 03 1991 10:42

	I'm having a little trouble determining just how to comply with the 
	MCC error model and exception handling.  I can find only two notes on 
	the subject using keywords and searching the notes file (see I did my
	best).  I have been trying to find a list of the common exceptions 
	and a guideline as to when they should be used.  I have found the 
	MCC_COMMON_DEFINITIONS.H but there are no comments that would indicate
	the meaning of each error code and when to use it.  I would also like 
	to see either the MSL for the common exceptions or a description of
	each argument that may be required.  I would suggest that this inform-
	ation should be include in chapter 8 or an appendix of the SRM.

	I am further confused as to when to use CVR without building an error
	reply.  The SRM is fairly clear, but the SAMPLE AM does not appear 
	to follow the SRM.  I am under the impression that the only errors 
	returned directly in the CVR by an AM might be MCC_S_INSVIRMEM and 
	MCC_S_INVHANDLE.  However, the SAMPLE AM returns most errors from 
	MCC routines and the design framework routines, directly in the CVR.
	I should think that these errors should be returned in a common 
	exception with an reply ID of MCC_K_CANNOT_COMPLETE as recommended 
	in chapter 8 of the SRM.

	Thanks in advance,
	Jeff Waltz

Chapter 15 contains more details on the common exceptions that you can return.

I don't know why we don't ship the "common"  .MS.  It doesn't appear that
there's an MRM for the "common" exceptions either.

My understanding is that all MMs should only return the CVRs that are listed
in chapter 11 for the mcc_call_xxx routine(s).  If the sample AM does otherwise,
I believe it is in error.

	Thanks Pete!  I don't know how I missed chapter 15!  It would be nice
	if there was an index hit somewhere in in 15 for common exceptions
	(in fact it would be nice if there was an index item for common 
	exceptions).

	Thanks again!