the warning when export stream in CADENCE

[cherishlzd]

Hi everyone,

I meet a problem when I translate the layout to the gds file in CADENCE. first I translate the layout to the gds file, then for verifying the gds file, I translate the gds file to the layout form again. but the layout is different from original layout. so check the warning when I translate the layout to the gds file. the warning is: warning(347): failed to get the stream layer rules for the layer-purpose pair '236:252'. all objects on this LPP will be dropped .
please help me, thanks.

 

[erikl]

Those layers are missing either in the stream-out and/or in the stream-in layers file.

 

[cherishlzd]

thanks erikl,

I found that there are no layers missing but additional metal existing in the layout translated by gds file.

 

[su6146]

maybe there are some problem in layer map, u can check it