Sided material loss problems

[kingjin]

Material given to the bar after the front side , save the file , and then open the file , single-sided material is lost , what do I do ? Thank you.

[kingjin]

I put my course of action recorded a video , to help me see what went wrong , thank you.

[kingjin]

Roy Hirshkowitz, hello , how to find out what the problem?

[Roy Hirshkowitz]

I can't read the shockwave file you sent without downloading the player-- which I don't have time for right now.  Resending the video as avi or mov might work.  I am going to be traveling for a few days-- so I probably won't be able to look until next week at the earliest.  

This isn't the type of problem I can usually fix, in any case.  It's almost certainly an AutoCAD issue. It's possible I may be able to offer some advice that will work better if I understand the problem a little better.

[kingjin]

Okay, I'll upload an AVI video to you, thank you for your help .

[Roy Hirshkowitz]

This one won't play.

[kingjin]

Roy Hirshkowitz, Hello , I sent you a GIF image should be all right .

[Roy Hirshkowitz]

This one I did manage to view successfully.  

I tried all of the steps in the animation and was not able to reproduce the problem.  After saving and re-opening it rendered fine.  This is ACA2013-- so it certainly could be happening in 2012-- but it's almost certainly an AutoCAD problem and there's likely nothing I could do anyway even if I could make the proiblem happen here.

Your best bet is to use the simple workaround of creating another surface displaced a small amount (1-2mm ?) from the original.

[kingjin]

Good , Roy Hirshkowitz, thank you for your answers patiently .