Unwanted Marker and GDSII Warning

Hello,

When I open my layout in XL at two places my layout has this X marker
which would indicate they are DRC error markers. However, I am sure
there is no DRC violation there. In fact, when I run DRC, those two
markers go away. Then I save the layout and close it and then open it
again and there they're again--at the same place! Does anyone have an
idea what this is?

Also, I'm getting this warning when I export my GDSII file:


Warning (347): Failed to get the Stream layer rules for the
layer-purpose pair '238:234'. All objects on this LPP will be dropped.

Does anyone know what this warning relates to? My mapping file, etc
are pointed to correctly. Is this warning related to those wierd X
markers? Help is much appreciated. Thanks

 

Hello,

one more question to ask: how do you convert a polygon/shape drawn with
'path' command to polygon? is that possible...thanks

 

I would examine them to see what they say about themselves. Select the
menu pick Verify->Markers->Explain and click on the marker. That might
give you a clue about where they are coming from.

The PIPO message is caused by the markers. Layer 238 is the marker
layer. Purpose 234 is the error purpose.

 

You can do it manually by selecting the path, then picking
Edit->Other->Convert To Polygon.

If you are trying to do it in PIPO, there is a checkbox on one of the
option forms that will convert paths to polygons as the Stream file is
written.

 

Try doing Verify->Marker->Explain over the marker and finding out what it tells
you. It might be indicating a short or something like that (VirtuosoXL tends to
produce connectivity-related markers, rather than DRC (unless you're using the
DRD feature) - but either way, doing an explain on the marker should tell you...

This is the marker/warning layer-purpose-pair. Recent versions (if my memory is
correct) give the name of the layer purpose pair rather than the
layernum/purpose num - but if you look in the default tech file:

<instdir>/tools/dfII/samples/techfile/default.tf

you'll see:

;System-Reserved Purposes:
( warning 234 wng )

;System-Reserved Layers:
....
( marker 238 marker )

It's telling you that there's nothing in the layer map file/tech file to tell it
what stream layer to translate this marker/warning layer to, and so the shapes
will be dropped.

Andrew.

 

Edit->Other->Convert to polygon.

Andrew.