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Conference azur::mcc

Title:DECmcc user notes file. Does not replace IPMT.
Notice:Use IPMT for problems. Newsletter location in note 6187
Moderator:TAEC::BEROUD
Created:Mon Aug 21 1989
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6497
Total number of notes:27359

231.0. "MAP PM : A bug has been unearthed" by CCIIS1::ROGGEBAND () Fri Aug 03 1990 14:48

    I just had an interesting experience with the IFT of V1.1 : When
    I double-clicked on a NODE4 entity, I had a message saying "this
    entity has no child entities", followed by a sequence of error windows
    claiming : 
    
    	"MAP PM : A bug has been unearthed"
    
    The DECterm window from which I started DECmcc had the following
    message :
    
%SYSTEM-F-ACCVIO, access violation, reason mask=00, virtual address=0000001F, PC
=00011108, PSL=03C00000

    Cordialement,
    
    Philippe.
    
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231.1Is it reproducable?BARREL::LEMMONFri Aug 03 1990 18:0525
The Iconic Map reads the NODE4 subclass information from the dictionary
when the user double-clicks into the first node4 entity.  Once this read in,
the double-click code checks the memory resident class information to see
if NODE4 has any children.  If there aren't any, it displays the error message 
"...no child entities..."  

It sounds like the memory resident NODE4 class information was corrupted.
Exactly how is unclear to me.  This type of corruption may also explain why 
the map datafiles gets bogus code values since  the class information is
written to the file (see note 220).

I need more info about your environment...

You mentioned you are running IFT V1.1.  The most recent kit is version X1.1.  

Do you remember the sequence of operations you performed before the accvio?

Is your namespace distributed? (i.e., you have more than one clearing house for
the same namespace?)

Is the bug reproducable?

/Jim

231.2CCIIS1::ROGGEBANDMon Aug 06 1990 08:2034
231.3It's back...CCIIS1::ROGGEBANDMon Aug 20 1990 07:4514
    
    The bug (or a different ont) has just re-appeared, but in a somewhat
    different fashion. I cannot fire up the Iconic Map PM, when I enter:
    
    $ MANAGE/ENTER/INTERFACE=DECWINDOW
    %MCC-F-PM_BUG, A PM bug has been unearthed
    
    That's all I get. It worked ok on friday night before I left, and
    unless a virus got into my station, I haven't got a clue of what
    might be causing this.
    
    As a temptative cure, I will re-install the kit.
    
    Philippe.
231.4Were the logicals mcc_icons,mcc_maps,mcc_uil set?TOOK::F_MESSINGERMon Aug 20 1990 12:137
    
    Just as a first stab, was the display set properly?
    
    e.g. set display/node=yournodename/cre
    
    Fred
    
231.5yesCCIIS1::ROGGEBANDMon Aug 20 1990 12:3416
    Some progress has been made :
    
    I can now fire up from the system account, but I'm back to the
    situation described in the basenote when I try to access one of
    my domains, so I guess my DNS setup has somehow got fouled up. I have
    tried to deregister all entities and delete my domains, but I'm
    getting messages such as "Invalid entity structure" or "No such
    entity" when I try to clear up the contents of my domains.
    
    The problem is that DNS$CONTROL isn't that much help tracing MCC
    directory contents... (I know, that's a DNS group concern. Hey,
    when will we be able to manage DNS with MCC ?)
    
    I'll let you know if I come up with anything. 
    
    Philippe.