doesn't recognize .STL file

[kjlpdx]

i designed a dust boot mold using fusion360 and exported the geometry as a .STL file.  the file exists, like 300K, but Cambam doesn't see it when i attempt to open it, even when specifying *.stl.  No ideas as to what else to try.  I am limited with the free version of fusion now.  i have created .TAP files which work like .NC files, and made them run my machine.  i still prefer the simple parallel machining of cambam and have yet to figure out how to make the complex fusion ops do the equivalent.
originally i was going to 3D print this at school, but the fancy, donated printer isnt working and no budget to get it repaired, so my idea is to mill a mold from foam and make 2 fiberglass halves.  not like it needs to be some gorgeous part, altho the renderings are fun to look at.

[pixelmaker]

can you please upload the file for analysis?

ralf

[Dragonfly]

Maybe because the extension is in capital letters. .STL
If so rename it or in the file open dialog in the file name field type *.* -> Enter to display all files in the folder.

[kjlpdx]

got it to work.  i think i wasnt waiting long enough.  fusion warns that computing is done via the cloud and it took many minutes.  now to make a bunch of foam dust.  bought a 1/4 x 6" ball nose just for this.  had to reconfigure my machine to get clearances for that long bit.   fusion was pretty slick in that i was able to easily change my model to be used as a mold and compensate for the thickness of the fiberglass i plan to use.  cambam still seems to work more quickly for this kind of cutting.

[pixelmaker]

The most important lesson to learn when working with 3D objects is to find the resolution you really need. I cannot see what the resolution of the object is. But the size shows that it is much too fine. Not even for a fine 3D print such a high resolution is necessary.
If a polygon reduction would have been done you would see that flattening would have less resolution. But this is not to be seen here.
So I would optimise the object first. I would start with 60% reduction and see how it looks like.
If objects are milled it is enough if 5-7 polygons have the size of the tool diameter. You can smooth the milling in CamBam.
The file size should be less than 200kb and then everything goes fast.

ralf