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Hi there, I have a survey file of an area of approx 3000 x 1500sqm, with 0.5m contour data (3d polys) and a few spot heights (3d loci). I have validated the data and Vectorworks detects no issues, but everytime I try to create a site model from this data Vectorworks appears to crash (presumably due to area / resolution?) I have extracted a smaller area of the same data as a test, and this generates a site model fine. I don't want to simplify polys, as a.) I don't want to lose definition and b.) simplifying polys causes the contours to overlap and I will have to spend a lot of time re-validating this data. I also don't want to amend my minor contour interval (0.5) as again, I don't want to lose definition. The site model is required for construction information to set levels and calculate cut and fill, so needs to be as accurate as possible. Do I have any other options in terms of creating a model from this data? Is there a typical size of area that Vectorworks can handle as a site model? Does anyone have any experience of the length of time it typically takes to generate a large site model? I work for a Landscape Architecture practice and we are just starting to test the capabilities of Landmark for our work, so good to understand the limitations in advance. I'm currently on Mac OS Sierra 10.12.6, Processor 3.2 GHz Intel Core i5, Memory 8 GB 1600 MHz DDR3; Graphics NVIDIA GeForce GT 755M 1024 MB... running Vectorworks Landmark 2014. (I will put this in my footer for future use!) Thanks, Lisa