There have been a number of posts about people having difficulties with large files and I have just encountered it myself. This actually is a follow up to an earlier post about exporting from Tekla (also part of the Trimble family): Tekla TBP files
The file I have been sent is 64MB and much larger (by a factor of about 10) than files I tend to generate in SU. SU will happily import the drawing and what I see on screen looks expected, but then I just get perpetual beachballing and enquiry reveals the SU is no longer responding. It could be a limitation of my hardware, I guess.
I have uploaded the file to Dropbox. It would be interesting to know if anyone else can open it and, if they can, what hardware they use to do it. Here’s the link: https://www.dropbox.com/s/96ek23zf6neox4k/out.skp?dl=0
Perhaps I should mention that Tekla’s advice for exporting to Sketchup when files are large is to do it in portions. Thing is, I don’t think the drawing in question would be that large if it were made in SU originally as it is full of what are (or should be) components with multiple repetition.