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Issue Adding New Layers to Tech ASCII File in Virtuoso 6.1.7

JJ202502261359

I am a beginner and am trying to create a new tech ASCII file in Virtuoso 6.1.7.

I created a new "z15" library and ran "compile on ASCII technology file," and then I provided the following file:

~/tech/abcde.tf

layerDefinitions(
techLayerPurposePriorities(
;( LayerName Purpose )
;( --------- ------- )
( snap drawing )
( snap1 drawing )
) ;techLayerPurposePriorities

techDisplays(
;( LayerName Purpose Packet Vis Sel Con2ChgLy DrgEnbl Valid )
;( --------- ------- ------ --- --- --------- ------- ----- )
( snap drawing snap t t t t t )
( snap1 drawing snap t t t t t )
) ;techDisplays
) ;layerDefinitions

However, I receive the following errors:

Library Manager created library "z15"
INFO (TECH-180006): Compiling class 'layerDefinitions'....
*WARNING* (TECH-280074): Layer snap1 was not defined.
*WARNING* (TECH-280082): *ERROR* Failed to define layer-purpose priority for (snap1 drawing).
*WARNING* (TECH-280074): Layer snap1 was not defined.
*WARNING* (TECH-280085): *ERROR* Failed to define layer display for (snap1 drawing snap t t t t t).

My goal is to add a new layer,
but it seems that any layer name not included in the "All LPPs" list in Tool -> Display Resource Manager -> Edit -> All LPPs causes the error above.

Can anyone provide guidance on how to add a layer, such as "snap1",
to the ASCII technology file even if it's not listed in the "All LPPs" section?

Thanks!

  • You'd need to define the layer snap1 within techLayers before you can refer to it in a techLayerPurposePriorities or techDisplays section. snap is a system defined layer, but snap1 is not. techLayers is where you associate a layer name with a layer number (layers are stored on integer layer numbers).

    Andrew

  • in reply to Andrew Beckett

    Thank you.
    I wrote it as follows, and it worked!

    layerDefinitions(
    techLayers(
    ( snap1 100 snap1 )
    )

    techLayerPurposePriorities(
    ( snap drawing )
    ( snap1 drawing )
    )

    techDisplays(
    ( snap drawing snap t t t t t )
    ( snap1 drawing snap t t t t t )
    )

    )

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