@User @User I was taking screen shot of the final gds after tapeout job when i noticed something strange. Earlier we had done the job after merging two analog projects in caravan. The findal gds view is shown. We can see routing and different components. But after integrating the third one, which is the digital one, the final tapeout job has shrunk the whole layout and placed in bottom left corner and placed filler in rest of the area. All the prechecks as well as tapeout job are clear. What can be the issue ?

@User : This is a bad scaling issue. Can you figure out where in the tapeout process it occurred?

@User this would the fill generation, it should not be caused by the script as it didn't change, rather the gds, something drastic must have changed when integrating that last digital project.

@User @User Thanks for looking into the issue. It might be because of the gds exported by the klayout. I have following dialog box when exporting from klayout. Can you tell me if these are the correct settings?

Magic is able to do that kind of internal scaling if it is set up wrong. @User : The fill script can't be doing it, because the fill script only generates an overlay on top of the whole chip. The fill script generated fill around the incorrectly-sized macro, so the incorrect scaling happened before the fill generation.

@User The final Design was integrated in Klayout and then the final GDS was generated by the Klayout again. All the prechecks were clear, but the design was scaled downed as you see in the image. We also tried to export GDS through magic but that GDS generated through magic fails FEOL checks. Now there are two thing: 1. GDS generated through magic fails FEOL and other prechecks. 2. GDS generated through Klayout passes all prechecks, but the design was scaled down as shown in image. We are really clue less how to solve this issue at this stage?

@User @User It was a GDS export issue . We were exporting GDS with 0.005 database units. When I exported GDS with 0.001 db units the scaling issue resolved