STL file does not covert into a Solid in Solid Edge.
Solution
The triangle size in the stl file is controlled by the CAD system that exported the stl file. In order to have a more precise stl file, tighten up the tolerance on the export option on the sending CAD system. A tolerance of .001 will create a much larger but more accurate stl file.
Notes and References
Hardware/Software Configuration
Platform: INTEL
OS: windows
OS Version: 10-1607
Product: SOLID_EDGE
Application: TRANSLATORS
Version: V222.0
Function: STL
Ref: 001-10251185