All,
Do you find these components (in the negative quadrant) in the gerber or
pick and place outputs?
jmc


Ian Wilson wrote:
> 
> At 10:09 AM 25/10/01 +1000, you wrote:
> >Ian, it's actually pretty easy to "loose parts".
> >We recently have had a situation where a group of components have been
> >unknowingly moved into the negative region of the database as part of a
> >move selection process early in the placement stage. It turns out that the
> >syncroniser matches the parts and the pins for the nets....therefore no
> >missing components.....The netlist exists in the database but the physical
> >ratsnest does not (I assume the physical ratsnest is only valid for the
> >database extents). The DRC was 100% ok. It would appear that the DRC makes
> >the assumption that if there is a valid net but no ratsnest then the net
> >must be connected. (ie no broken net) (also no clearance errors either)
> >
> >I would be interested if anyone else has had this problem.
> >We use SP6, W98
> >
> >We only found it by noticing an associated text string on the left hand edge
> >of the database area when zoomed right out.
> 
> I too have seen the moving components (not for a long time though), for me
> at least, they have always existed in the netlist and the component
> report.  I had not noticed what happens to the ratsnest when a component is
> off in ga-ga land but it still exists in the database, the netlist, the
> component report, the ASCII PCB version and even component browser. I have
> not checked if they exist in an exported spreadsheet.
> 
> Thanks for the info on the ratsnets not showing for the "gone-ape"
> components (technical term),
> Ian Wilson

-- 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>John M. Cardone       Electro-Mechanical Dsgn. Engr. Grp.
>M/S 278-100           Mechanical Engineering Section, 352
>4800 Oak Grove Dr.    NASA / Jet Propulsion Laboratory
>Pasadena, Ca 91109 
>Tel: 818.354.5407     MailTo:[EMAIL PROTECTED]
>Fax: 818.393.4860
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

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