OCCT

puts "============"
puts "0032821: DEWrapper - Implementation of a common toolkit for importing and exporting CAD files"
puts "============"
puts ""

catch { Close D2 }
catch { Close D3 }

param xstep.cascade.unit MM
if [catch {readobj res0 $filename} catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}
param xstep.cascade.unit M
if [catch {readobj res1 $filename} catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}

if [catch {ReadFile D2 $filename} catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}
XGetOneShape S2 D2
if { [XGetLengthUnit D2] != "mm" } {
  puts "Error: incrorrect document's length unit"
}

XNewDoc D3
if [catch {ReadFile D3 $filename -conf "global.general.length.unit : 1000 "} catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}
if { [XGetLengthUnit D3] != "m" } {
  puts "Error: incrorrect document's length unit"
}
XGetOneShape S3 D3

if [catch {readfile S4 $filename } catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}

if [catch {readfile S5 $filename -conf "global.general.length.unit : 1000 "} catch_result] {
    puts "Error : Problem with reading file"
} else {
    puts "OK : Reading is correct"
}

array set areas {0 1.21752e+07 1 1.21752e+07 2 1.21752e+13 3 1.21752e+07 4 1.21752e+13 5 1.21752e+07}
array set results {0 res0 1 res1 2 S2 3 S3 4 S4 5 S5}
for { set anind 0} { $anind < 6 } { incr anind } {
  checkprops $results($anind) -s $areas($anind) -eps 1e-2
}

Close D2 
Close D3