[gme-users] Too many passes while parsing XML file error

[James Edmondson]

Hi Kevin,

I would think that a good debug message could be constructed using a
coloring scheme or by keeping a list of generated models so far in the
importation process and having a simple check for cycles in the XME
structure that looks at the previously concretized models from the XME
source. I'm not sure if this is a common bug with model developers or
not, but if it is, a cycle detection algorithm in the XME import would
be very useful, I would think, in tracking down the culprit and
constructing detailed debugging information.

Cycle and deadlock detection have a lot of attached literature. Does
anyone already have a deadlock detection interpreter for GME that
might be modified to look for this in an XME file (before it is
imported). This might help James Hill find the cycle in his client's
large XME model. He probably doesn't have the MGA file, so this is
sort of like finding a needle in an XML haystack. Does anyone have
experience in looking for these cycles in XME files so we all might
know specifically what to look for when this happens in our own
models?

Thanks,
James



On Wed, Jun 29, 2011 at 9:41 AM, Kevin Smyth <ksmyth at isis.vanderbilt.edu> wrote:
> Yes, this only happens when there is a circular reference. For example,
> if you have a subtype, then move the archetype into the subtype, there
> is a circular reference. Or if a set has a reference member that
> references the set. Or a simple circular reference chain.
>
> Unfortunately, due to the design of the xme parser, the only way to
> determine what is happening is with a debugger.
>
> Kevin
>
> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf Of James
> H. Hill
> Sent: Tuesday, June 28, 2011 4:08 PM
> To: gme-users
> Subject: Re: [gme-users] Too many passes while parsing XML file error
>
> Hi James,
>
> On Jun 28, 2011, at 4:52 PM, James Edmondson wrote:
>
>> Hi James,
>>
>> Do you have a link to the XME available for download?
>
> First, let me check with sponsors before attaching the model. ;-)
>
>> The only thing I
>> can think of is a circular ref of a recursive model.
>
>> Is that something
>> that is possible with your paradigm?
>
>> Like a model ref to itself within
>> the model?
>>
>>
>
> That could be possible. It would be great if GME would report why it is
> going though 100+ phases in the parsing. I have never seen it go over 3,
> even for large models. :-)
>
> Thanks,
>
> James
>
>> Thanks,
>> James
>>
>>
>> On Tue, Jun 28, 2011 at 12:39 PM, James H. Hill <hillj at cs.iupui.edu>
>> wrote:
>>> Hi,
>>>
>>> I have a model that when I try to import it, goes through at least
>>> 100+ passes before displaying the following error message:
>>>
>>>   Too many passes while parsing the XML file.
>>>
>>> Has anyone experienced this problem?! If so, how did you resolve this
>
>>> problem? This is the first time I have encountered this problem, and
>>> the .xme files in only 181 KB, which is small compared to others that
>
>>> I am able to successfully import.
>>>
>>> Thanks,
>>>
>>> James
>>>
>>> _______________________________________________
>>> gme-users mailing list
>>> gme-users at list.isis.vanderbilt.edu
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