https://sourceforge.net/tracker/?func=detail&aid=2933167&group_id=237831&atid=1104178

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@61 bbaffbd6-741e-11dd-a85d-61de82d9cad9

pycam/Importers/STLImporter.py

@@ -51,7 +51,11 @@ def ImportModel(filename, use_kdtree=True):
     kdtree = None
 
     f = open(filename,"rb")
-    header = f.read(80)
+    # read the first two lines of (potentially non-binary) input - they should contain "solid" and "facet"
+    header = f.readline(100)
+    header += f.readline(100)
+    # read byte 80 to 83 - they contain the "numfacets" value in binary format
+    f.seek(80)
     numfacets = unpack("<I",f.read(4))[0]
     binary = False