Missing parts not working in leoCAD,please help

[momo]

Hi everyone,
  I am a newbie of LDraw,I have a project now need to import ldd file into 3dsmax,I have already known there is a way to convert it from ldd to leoCAD,and then export 3ds or obj format,what I confusing is how to using missing parts of leoCAD,
below is the file I will export,all units in lego:

Missing units in leoCAD:

I used 1 brick for test,in lego


missing in leoCAD

then ,following the http://www.ldraw.org/cgi-bin/ptscan.cgi?q=4869
I downloaded 4869.dat

parts/4869.dat
Plane Jet Engine Centre

I searched the library path,like below:

 
The 4869.dat has already there



But why it can not display in leoCAD?Do I missing some steps?Please help,I spent days and did not find a solution,thanks in advance(I also uploaded the ldd and ldr files)

[Victor Di Rienzo]

check this documentation page. https://www.leocad.org/docs/library.html

[momo]

check this documentation page. https://www.leocad.org/docs/library.html

I already checked that page,the example brick 4869.dat in the LDraw official parts library,do I need "Using a Custom Parts Library"?If so,the LeoCAD has  already set the path:




1.The complete.zip file include the 4869.dat



2.The parts path,already include the 4869.dat



I tried set the folder path which included the part dir,





And reopen the LeoCAD, then open the missing part file,still DOES not display,so,is it the LeoACD problem or my steps problem?Please point me,thanks!

[momo]

check this documentation page. https://www.leocad.org/docs/library.html

Finally,I found the issue,my steps are all correct,the issue is the Lego's ldraw.xml ,I download a new one from http://gallaghersart.com/page/new_ldd_pa..._ldraw.xml
,then the missing part of example can be displayed!Wow,but a lot of them still can't display, where should I get the ldraw.xml  which include all missing bricks?Or is there a conversion tool can fix this issue?

[Magnus Forsberg]

I think the latest, and constantly improved, version of ldraw.xml is kept at Eurobricks.

Download a fresh copy from here.

[momo]

I think the latest, and constantly improved, version of ldraw.xml is kept at Eurobricks.

Download a fresh copy from here.

Thanks too much for great help