Add a check for correct reading of a STEP file with a "SUB" symbol
--- /dev/null
+puts "==================================================="
+puts " 0025486: STEP file containing ASCII control character cannot be read"
+puts "==================================================="
+puts ""
+
+pload DCAF
+
+# Read file
+ReadStep D [locate_data_file bug25486_badsymbol.stp]
+XGetOneShape res D
+
+# Checking
+checkshape res
+checknbshapes res -vertex 8 -edge 12 -face 6 -wire 6 -compound 0
+
+Close D
\ No newline at end of file